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• 
  @ryanhong9395Ай бұрын

  what chemical properties determine the specific heat capacities for different materials,

• 
  @KimberlySantiago-mg7luАй бұрын

  How do cups such as Stanleys, and hydroflask keep our water cold and maintain the ice for a long time?

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  @ChemistrywithDrGАй бұрын

  great question! We are going to address this question when we discuss thermodynamics. The double walled structure of the cup prevents heat from getting through the cup as it is evacuated in the middle. No gas between = no heat transfer. Similar to how some double paned windows work.

• 
  @NicholeWheeler-19Ай бұрын

  In general, what do too many or too few eggs do to dough and why do they have this effect? Also, why can an allergic reaction start in the throat and then transition to the nose (ie. breathing problems, stuffy nose)?

• 
  @ChemistrywithDrGАй бұрын

  These are some great questions. For allergies, this tends to be the area most directly exposed to the allergen, which is usually ingested or inhaled. Too few or too many eggs leads to an imbalance in the egg protein binder to the rest of the ingredients for dough.

• 
  @didiez86782 ай бұрын

  So helpful, thank you so much !

• 
  @ChemistrywithDrGАй бұрын

  Glad it was helpful!

• 
  @AuthenticEducationChannel2 ай бұрын

  Dear have you any Phd position in your lab?

• 
  @ChemistrywithDrGАй бұрын

  No we don’t. Thanks for asking though!

• 
  @tankisomontsi64923 ай бұрын

  U-tube!! ... I like that, l like that a lot

• 
  @ChemistrywithDrGАй бұрын

  We gotta have fun in chemistry some times too!

• 
  @user-rq6dx5ro3w3 ай бұрын

  Thank you sir, for your nice explanation. i have one question regarding standard addition. If the unknown concentration shows a negative signal(i.e S1(absorbance)= -0.1245) of arsenic due to matrix(salt) effect in an atomic absorption spectrometer then how i will calculate it from standard addition method? waiting for your kind response.

• 
  @Lavendercandle3 ай бұрын

  THANK UU

• 
  @ChemistrywithDrGАй бұрын

  You're welcome!! Glad it was helpful.

• 
  @user-mj9nn8qj5r4 ай бұрын

  Finally a video on KZread which explains this

• 
  @ChemistrywithDrG4 ай бұрын

  I am glad it was helpful. Thanks for the positive comment. What other concepts would you like to see explained or discussed?

• 
  @gabegiancarlo78195 ай бұрын

  Considering the growing interest in sustainable and green chemistry, how can principles of atom economy and energy efficiency be better integrated into industrial chemical processes to minimize environmental impact without compromising yield and efficiency? Additionally, how can recent advancements in catalysis and renewable materials contribute to more sustainable chemical manufacturing practices?

• 
  @ChemistrywithDrGАй бұрын

  Catalysts can be used to make materials with less waste and faster. They also reduce the amount of energy needed to make industrial products, such as biodegradable plastics.

• 
  @user-gx7uv9rz6k5 ай бұрын

  What components of a sunscreen helps protect our skin from uv exposure?

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  @ChemistrywithDrGАй бұрын

  Awesome question. Depending on the sunscreen, in can be titanium (IV) oxide suspended in the sunscreen or an organic molecule like oxybenzone. These substances absorb energy in the UV range, preventing the UV light from hitting your skin.

• 
  @makayleewool25 ай бұрын

  How can anti-inflammatory medications like Advil and Aleve make it possible to engage in physical exercise without experiencing pain?

• 
  @ChemistrywithDrGАй бұрын

  This has a lot to do with the pathways in the body that are blocked, that prevent inflammation or pain from translating from a part of the body to the brain.

• 
  @user-qj8pm1cb6f5 ай бұрын

  how and why does caffeine work on our bodies?

• 
  @ChemistrywithDrGАй бұрын

  Amazing question. I think this article from NIH gives a great explanation - www.ncbi.nlm.nih.gov/books/NBK223808/#:~:text=Caffeine%20increases%20intracellular%20concentrations%20of,free%20fatty%20acids%20and%20glycerol.

• 
  @shayaanahmed57925 ай бұрын

  Why do allergic reactions to foods occur? Why do some foods, like peanuts, cause dangerous chemical reactions in our bodies, whereas others, are fine? What is going on inside our bodies that make some of us react so severely?

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  @ChemistrywithDrGАй бұрын

  Many times it has to do with how our body responds, through antibodies, etc. to a chemical or substance in the allergen.

• 
  @user-gm9yr6vv2i5 ай бұрын

  How does inhaling vapor rub bring sinus relief? Also, what part of a molecule causes a different smell?

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  @ChemistrywithDrGАй бұрын

  One of the major components of vapor rubs is menthol. This article from NIH gives a good overview of how menthol reacts to our airways. www.ncbi.nlm.nih.gov/pmc/articles/PMC3628651/

• 
  @user-pd6ez6wl3p5 ай бұрын

  How do botanical extracts and plant-derived ingredients impact skincare formulations?

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  @ChemistrywithDrGАй бұрын

  In a way, these extracts come from natural products and get extracted many times via steam distillation. The steam is passed over leaves (such as Eucalyptus), which "dissolves" the oil from the leaves, then they are cooled and the water vapor separates from the oil since they have different boiling point temperatures (and vapor pressures at the same temperature)

• 
  @kaitlynmiyasato34255 ай бұрын

  How are instant ramen packs produced so that they become real noodles when hot water is added?

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  @ChemistrywithDrGАй бұрын

  When they are first produced, they are air dried (or freeze dried) to remove the water content, which helps the noodles last longer. Then we just add hot water, which quickly cooks the partially cooked noodles and you have a quick meal. :)

• 
  @katestenta61415 ай бұрын

  What makes a "fluorescent" highlighter marker so bright?

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  @ChemistrywithDrGАй бұрын

  Amazing question! This is because the highlighters actually contain molecules that fluoresce! They absorb the light energy from the visible spectrum, then they emit their own light at a different wavelength, which in a way they "glow." This added fluorescent emission causes the highlighters to be even brigher than normal pigments. Normal pigments simply reflect light at a specific wavelength, which is why they are not as bright.

• 
  @user-me6iz9ye5l5 ай бұрын

  how do fever reducers actually lower your fever?

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  @ChemistrywithDrGАй бұрын

  Such a great question, and this article by NIH gives a better answer than I ever could. pubmed.ncbi.nlm.nih.gov/23545161/

• 
  @user-ij5vl3yf5j5 ай бұрын

  how are some materials heat resistant like certain spatulas but not others

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  @ChemistrywithDrGАй бұрын

  great question, they are not able to transfer heat as well. They have a high capacity to prevent molecular KE transfer (heat) and do not promote the movement of KE through their materials.

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  @nataliepeterson-hunt39355 ай бұрын

  Why is it that chlorine damages hair? What happens to our hair when chlorine is damaging it?

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  @ChemistrywithDrGАй бұрын

  Such a fantastic question Natalie. The primary mechanism that causes hair damage from exposure to pool chlorine is that the sodium hypochlorite (pool chlorine) can dissolve and remove your hair oils, which makes your hair more susceptible to air and sun damage.

• 
  @user-hw2gb5qr7n5 ай бұрын

  I have always been curious as to why water bottles have expiration dates on them. Why are they there?

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  @ChemistrywithDrGАй бұрын

  Great observation! It is not necessarily that the water in the bottles expire, but there is a slow leaching of substances from the plastic of the bottle into the water and at a certain point, the concentration of leached materials gets too high to be considered safe and the water "expires."

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  @user-bu1ju7yy5z5 ай бұрын

  What in caffeine gives people energy in a short amount of time?

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  @ChemistrywithDrGАй бұрын

  Amazing question. I think this article from NIH gives a great explanation - www.ncbi.nlm.nih.gov/books/NBK223808/#:~:text=Caffeine%20increases%20intracellular%20concentrations%20of,free%20fatty%20acids%20and%20glycerol.

• 
  @isabellathompson39115 ай бұрын

  What chemical reaction occurs in brain decay such as dementia?

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  @ChemistrywithDrGАй бұрын

  fantastic question Isabella. This has a lot to do with the affected structure of some proteins, but this article from NIH gives a good overview of this - www.nia.nih.gov/health/alzheimers-causes-and-risk-factors/what-happens-brain-alzheimers-disease#:~:text=In%20Alzheimer's%20disease%2C%20however%2C%20abnormal,the%20synaptic%20communication%20between%20neurons.

• 
  @user-tj8qm1dk7h5 ай бұрын

  How do anti-inflammatory medicines like Advil allow you to do physical activity with less pain?

• 
  @ChemistrywithDrGАй бұрын

  This has a lot to do with the pathways in the body that are blocked, that prevent inflammation or pain from translating from a part of the body to the brain.

• 
  @joshvomund11635 ай бұрын

  How is plastic made? What makes plastic strong, flexible, and relatively cheap to make?

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  @ChemistrywithDrGАй бұрын

  Plastics usually start from natural gas or oil and through a few chemical reactions. Usually, the smaller molecules, like ethane and propane, are dehydrogenated to form ethylene or propylene. These are then polymerized (connected together in long chains of many ethylene or propylene molecules bonded together), which forms the plastics. That is why plastic bottles can be labeled as polyethylene or polypropylene.

• 
  @KirbyWilliams-mz3xu5 ай бұрын

  What chemical reactions occur during tooth decay? Why are some people more prone to tooth decay than others?

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  @ChemistrywithDrGАй бұрын

  many times, tooth decay occurs from bacteria, when the bacteria creates acidic compounds that are released onto the teeth, which causes the teeth to dissolve. Think of how vinegar (weak acid acetic acid) can dissolve an egg shell, but much slower in our mouth on our teeth.

• 
  @user-sp8gf7rm5b5 ай бұрын

  What is the difference in chemistry of a perfume thats lasts a long time versus a perfume that fades quickly?

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  @ChemistrywithDrGАй бұрын

  This can be influenced by many things. The size of the molecule that we smell with the perfume, the air movement (wind, air purifiers), and the diffusion of other molecules. Great question. Many times, the larger the molecule that we smell from the perfume, the faster it will deposit out from the vapor or gas phase as gravity pulls it back to the surface.

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  @user-po8mg6sw1z5 ай бұрын

  How do some cooking oils have a higher or lower smoking point?

• 
  @ChemistrywithDrG5 ай бұрын

  Fantastic question. We will think about this when we focus on intermolecular forces, molecular shapes, and interactions

• 
  @isac.rbin145 ай бұрын

  How do Hot Hands work, and how do they get warm just by shaking and holding them?

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  @ChemistrywithDrG5 ай бұрын

  This is such a timely question! We are actually going to use those in class on the first day!

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  @user-bi1rw3mn4u5 ай бұрын

  How do certain ingredients in makeup interfere with one another to impact the longevity and appearance of the look?

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  @ChemistrywithDrG5 ай бұрын

  Amazing question. We will consider interaction of molecules based on structure during class and hope you get to think in depth about the interaction of molecules then!

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  @CH--TranNgocAnhMy6 ай бұрын

  You're so underrated! Such clear explanation!!

• 
  @ChemistrywithDrG6 ай бұрын

  Thank you very much. I appreciate the feedback.

• 
  @PritomAhad7 ай бұрын

  So with internal standard, am i still getting a conc v signal graph nd using it to find conc of unknown?

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  @ChemistrywithDrG5 ай бұрын

  You will be using a comparison. You will have a standard solution that has a known amount of the analyte you are interested in quantifying (for example caffeine) and a known internal standard concentration added (for example benzoic acid) and get a signal for both caffeine (analyte) and benzoic acid (internal standard). Then you will add the same amount of benzoic acid to your unknown solution as an internal standard. Get the signal for both caffeine and benzoic acid, then compare the signals for caffeine and benzoic acid from the standard solution to the unknown solution.

• 
  @yunengliao61908 ай бұрын

  Good! thank you for sharing!

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  @ChemistrywithDrG6 ай бұрын

  Glad it was helpful

• 
  @NulliosG8 ай бұрын

  Very insightful. Thank you for the refresher.

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  @ChemistrywithDrG8 ай бұрын

  Glad it was helpful!

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  @ivanbombana72828 ай бұрын

  Good morning. What should I do to understand if I have matrix effect?

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  @ChemistrywithDrG8 ай бұрын

  You could think about measuring an external standard with a known concentration with the instrument. Then dope in the same standard analyte amount into the sample and see if you get the same signal increase in the doped standard as in the external standard. For example, an external standard with a concentration of 0.2 M gave a signal of 0.5. The sample gives a signal of 0.3 for the analyte. If the sample doped with 0.2 M gives a signal of 0.8 (the sum of the sample and the external sample signal) then there is no matrix effect. However if it differs from this then you know there is a matrix effect.

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  @dhuhabariysa68698 ай бұрын

  this was very helpful, thank you!

• 
  @ChemistrywithDrG8 ай бұрын

  Glad it was helpful!

• 
  @za760711 ай бұрын

  Great thank you! I have a question. how should I specify the maximum and minimum range for calibration carve while I have no idea about the concentration in my sample?

• 
  @ChemistrywithDrG9 ай бұрын

  Great question. If you are unaware of the concentration of your sample, you will want to do some research about the instrument you are using. What is the linear range possible with the instrument? What is the LOD or LOQ? Then, do a first test of your sample with a dilution, to make sure that the pure sample will not overload your detector or your analytical system. If it is low, then analyze the sample at higher and higher concentrations, until you get a significant signal.

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  @za76079 ай бұрын

  @@ChemistrywithDrG thank you for replying 🙂 so helpful !

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  @ChemistrywithDrG8 ай бұрын

  @@za7607 Glad it was helpful!

• 
  @yukinaminato Жыл бұрын

  Thank you so much, sir! This video is really helpful.

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  @ChemistrywithDrG Жыл бұрын

  Glad it was helpful! Thank you for letting me know.

• 
  @tannahreyes9021 Жыл бұрын

  We where unable to see the formula

• 
  @ChemistrywithDrG Жыл бұрын

  thank you for letting me know. I made sure to change the way this was done for future videos.

• 
  @jacobvandijk6525 Жыл бұрын

  Enthalpy in chemistry is quite something else. This is pure physics.

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  @ChemistrywithDrG Жыл бұрын

  I appreciate the connection you see between chemistry and physics. In chemistry, we tend to focus on the connection of enthalpy to chemical reactions.

• 
  @kibsdaspin3583 Жыл бұрын

  Life saver 🩷

• 
  @ChemistrywithDrG Жыл бұрын

  Glad it was helpful

• 
  @stoni27 Жыл бұрын

  Build up of pressure?

• 
  @ChemistrywithDrG Жыл бұрын

  thanks for sharing! I will post the answer on Sunday.

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  @dragonrider3074 Жыл бұрын

  I think it's because there is gun powder in the TNT

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  @ChemistrywithDrG Жыл бұрын

  great thoughts, but what about the gun powder reaction does this?

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  @dragonrider3074 Жыл бұрын

  @@ChemistrywithDrG maybe there is a chemical that is highly reactive to the fire when it is heated a reaction happens

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  @kevintejeda5980 Жыл бұрын

  What a cool reaction!

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  @ChemistrywithDrG Жыл бұрын

  Yes. I think so too Kevin!

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  @devpatel2309 Жыл бұрын

  thank you , keep it up

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  @ChemistrywithDrG Жыл бұрын

  Glad to hear it is helpful.

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  @normanbates6638 Жыл бұрын

  Great video, thanks!

• 
  @ChemistrywithDrG Жыл бұрын

  Great. Glad you liked it.

• 
  @vincentthedawg Жыл бұрын

  Best thing I've seen!

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  @ChemistrywithDrG Жыл бұрын

  Glad to see you liked it Vincent. More of these types of videos are in production.

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  @nohuh Жыл бұрын

  Thanks Dr. G

• 
  @ChemistrywithDrG Жыл бұрын

  Most welcome. It was a pleasure having you in my class this past year.

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  @nohuh Жыл бұрын

  Thanks Dr. G

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  @ChemistrywithDrG Жыл бұрын

  Such an interesting thing that these liquid volumes are not additive.