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A 100.0, mL of 10.0 mM phosphate buffer, pH 7.5 (pKa2 = 7.2). You are provided with 0.200 M KOH and 0.100 M KH2PO4 solutions. Calculate volume of KOH and KH2PO4 solutions. (HINT: determine the mole ratio of the salt (K2HPO4) and acid ( KH2PO4) using buffer equation, then calculate the volume of KOH and KH2PO4 required) Please also note that the K2HPO4 is formed by mixing KOH and KH2PO4 together.
KOH + KH2PO4 --> K2HPO4
A thin piece of semiconducting silicon will be used to fabricate an electrical device. This layer is 0.10 cm thick and cut into a strip 0.50 cm wide by 1.50 cm long. Electrical contacts are placed at opposite ends of its length.
Find the vapor pressure of a solution that contains 218 g glucose in 460.0 mL of water at 30 degrees Celcius.
An expanding gas does 150.0 J of work on its surroundings at a constant pressure of 1.01 atm. If the gas initially occupied 68.0 mL, what is the final volume of the gas.
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base.
Calculate the ph when 47.0 mL of 0.309 M of a certain monoprotic weak acid, HA, is mixted with 47.0 mL of 0.309 M of sodium hydroxide solution
What % of the solution/solid was transferred over to the container
What is the specific heat of a substance that requires 124 J to raise temperature of 95.5 g from 20.0 degrees celsius to 25 degrees celsius?
Complete combustion of 3.40 of a hydrocarbon produced 10.4g of CO2 and 4.98g of h20. what is the emperical formula for the hydrocarbon
What amount of solid NaOH must be added to 1.0 L of a 0.15 M H2CO3 solution to produce a solution with [H+]=3.3*10^-11 M ? There is no significant volume change as the result of the addition of the solid.
ow many grams and how many moles of octane must be burned to release 450 kcal?
can you write the oxidation reduction reaction for a solution of potassium dichromate added to an acidified solution
During the course of an experiment, a 0.300 M NaCl solution with an initial volume of 25.0 ml is diluted to a total final volume of 26.0 ml. What is the concentration of NaCl in the final solution?
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