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Answer the question below about a weak acid (HA) with pKa = 7.4. a) what is the ratio of conjugate base to conjugate acid after 100 ml of 1M HA is adjusted to a pH of 8? b) under the conditions in part a, how many moles of HA are present? How many moles of A- are present? c) What is the pH of the solution described in parts a and b after 20 mL of 1M HCl is added?
spontaneous chemical reactions produce products which are more energetically stable than the reactants which form them. A strong acid reacts with a strong base to produce water and the free ions of a salt.
Permenant sterility in women occurs at 300.0 rem of exposure. The source radiates with 3540 rem at 500.0 cm.
what is the amount of hydrogen in g in the sample? Vapor pressure of water at 20 degrees celsius is 17.5 torr.
the average adult has about 16 g of sodium ions in her blood. assuminga total blood volume of 5.0 L, what is the molarity of Na+ ions in blood?
What mass of magnesium is required to produce enough gas to exert pressure of 0.50 atm in a 50.0 mL flask at a temperature of 25.0 degrees Celcius? show all work.
To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. A chemical engineer places a mixture of noble gases consisting
A graduate student tried to make -fluorophenylmagnesium bromide by adding magnesium to an ether solution of -fluorobromobenzene.
Suppose you were given an unknown compound. Your task is to identify which compound it is using melting point data and measurements only.
Write the reaction for the hydrolysis of propionyl propionate (an ester) -- that is, the reaction of this ester with water, yielding a carboxylic acid and an alcohol.
Identify the cell reaction that will give the maximum operating voltage. Write out the oxidation and reduction half reactions, showing how they sum to the cell reaction. Identify the reaction that takes place at the anode and the cathode.
If the electrochemical cell is allowed to operate as a gavanic cell, which solution species will be oxidized, which solution species will reduce. write the sybolic representation for the galvanic cell.
A gas sample is held at constant pressure. The gas occupies 3.26L of volume when the temperature is 51.6 F . Determine the temprature at which the voloume of the gas is 3.45 L.
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