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To standardize a solution of NaOH, one uses a primary standard called potassium hydrogen phthalate (KHP). It is a monoprotic acid. It has a molar mass of 204.33g/mol. Suppose you weigh out .556g of KHP and dissolve it in water. It requires 14.48 mL of NaOH to reach the endpoint. What is the concentration of the NaOH solution?
For each of the following determine whether the calculated molarity would be too low too high or unaffected and explain why a. you did not react all of the excess zinc before filtering the reaction mixture
Titration with sodium thiosulfate required the use of 18.94mL of 0.07992M Na;>203' Find the molarity of ascorbic acid in the juice.
A water chemist obtained a 250-mL sample from a nearby lake and fixed the oxygen on-site wth alkaline solutions of MnS04 and Kl-NaN3-. returning to the labrotary, a 200-mL sample was analyzed by acidifying the sample
The temperature of the glucose solution is 20degrees Celsius. What pressure drop must be applied across the membrane to stop the flow of water into the glucose solution. Assume that the glucose concentration is 1 mg mL^-1 and that the molecular we..
The rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 340 K and 350 K. What must the activation energy be for the rate constant to double as described
What mass of sodium benzoate should be added to 140.0 mL of a 0.15 M benzoic acid solution in order to obtain a buffer with a pH of 4.25
Draw the most stable chair conformation for (1S,3S)-1-chloro-3-ethylcyclohexane. Please explain your answer.
the volume of blood in the body of a certain deep-sea diver is about 6 l. blood cells make up about 55 of the blood
Solve an equilibrium problem (using an ice table) to calculate the pH of each solution. A solution that is 0.20 M in HCHO2 and 0.14M in NaCHO2
Carbon monoxide and oxygen both can bind to hemoglobin, an important molecule for oxygen transfer in our body. In addition, they compete in binding to this same molecule
if 10.4 mols of hydrogen h3 and 9.1 mols of oxygen o2 are placed together in a container and allowed to react according
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned.
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