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Question- How many grams of calcium chloride are needed to create a heat pack that will reach +30 degrees Celsius above room temp. using 500mL of water?
Rework your solution from the beginning and check each step carefully.
Draw the structural formula for the same. Explain the manner in which the structural formula of polar and non-polar amino acids would vary.
Let's say that you are given a 0.215g of unknown weak acid and asked to dilute with 75 mL of DI water. You then use a standardized 0.125 M NaOH to titrate the unknown acid solution
Calculate the molar solubility of PbCl2 in a 0.20 M NaCl solution. The Ksp of PbCl2 = 1.7 x 10-5. Can any assumptions be made to simplify this calculation
The following charges on individual oil droplets were obtained during an experiment similar to Millikan's determine a charge
You have a solution of a buffer with 10 mMoles of the buffer. Initially the solution has a pH of 6.8. You add 100 mM kOH and the pH rises to 7.1. The pKa of the buffer is 6.3.
The Al2O3 does not react. If the sample residue weighs 2.489 g, what is the mass fraction of Fe2O3 in the original sample?
Chlorine dioxide gas is used as a commercial bleaching agent. One method of preparing ClO2 is the reactiong of chlorine gas with sodium chlorite as:
You have 425 mL of 6.00 M nitric acid and want 100.00 mL each of 2.00 M, 1.00 M, 0.100 M, 0.0500M, 0.0100 M, and 0.00500 M nitric acid solutions. Explain how you would prepare each solution. Do you have enough nitric acid to make all of these solu..
If you had a stoppered flask with basic luminol and then opened it to the air, why would the chemiluminescence be more pronounced than with the flask stoppered? Why is the chemiluminescence even more pronounced with the ferricyanide/hydrogen perox..
The extent of ionization of a weak electrolyte is increased by adding to the solution a strong electrolyte that has an ion in common with the weak electrolyte.
Write the chemical equation for the ionization of each of the following weak acids in water. (Some are polyprotic acids; for these write only the equation for the first step in the ionization.
They started with 0.47 grams of a mixture containing 0.143 grams of the acid and recovered 0.117 grams of benzoic acid. What was their percent recovery?
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