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"Besides the traditional colorimetric acid/base indicators, there is another class that doesn't use color, the olfactory acid-base indicators! These compounds smell or don't smell based on their pH and a lot of them are plant-derived compounds. For example, vanillin (C8H803), the active flavoring in vanilla flavoring or vanilla extract, is an olfactory acid base indicator. It loses it's characteristic smell when it is basic. The ka for vanillin is 1.79x10^-8.
You want to make a vanilla cake and give it that extra vanilla-ly flavor, you add exactly 1.00 g of pure vanillin (acid form, C3H7O3-) to 500.0 mL of cake batter. But, your roommate, trying to help, adds too much of the rising agent NaHCO3. He adds 5.0 grams. Will you be able to smell the vanillin in your cake? To anser this question, you need to determine how much of the protonated form of vanillin will be in cake batter. IF it is over 90%, then you will not be able to smell it!"
(C3H7O3)- + (HCO3)- = C3H8O3 + (CO3)2- The equal sign stands for the equilibrium arrows.
The wavelength corresponding to the threshold frequency to tungsten surface is 230nm. Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
In the borohydride reduction of camphor, the two end products were borneol and isoborneol.
Heart pacemakers are often powered by lithium-silver chromate "button" batteries. The overall cell reaction is: 2 Li(s) + Ag2CrO4(s) -> Li2CrO4(s) + 2 Ag(s)
Using curved arrows to show the flow of electrons and being careful to balance mass and charge for each step, provide a mechanism for the reaction below that show how both products are formed
How does the answer for part (a) change if the gas of interest is He? c) What is the largest molecular mass that is capable of escaping Earth's surface at 298 K?
How many grams of Ammonium phosphate need to be combined to 500 and
How long would it take for 1.50 mol of water at 100.0 0C to be converted completely into steam if heat were added at a constant rate of 19.0 J/s?
How many grams of O2 are needed to react with 18.5 grams of Mg? 2 Mg(s) + O2(g) → 2 MgO(s)
Bromine addition to trans-cinnamic acid, During bromine addition to trans-cinnamic acid, why is it necessary to maintain excess bromine in the reaction mixture
How would you make 2-methyl-1-phenyl-3-pentanone from the following available compounds ethanol, isopropyl alcohol, and toluene?
A 47 kg sample of water absorbs 388 kj of heat. If the water was initially at 27.6 Celcius, what is its final temperature?
calculate the percentage of empty space in 1 mol of water at 25C. Obtain the density from the experiment " Some Measurements of Mass and Volume." The volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen atoms.
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