A 0.0670 mol/L buffer, pH 7.10 is to be prepared. The pKa of KH2PO4 is 4.71.
A volume of 1.00 liter is needed.
a. What concentration of KH2PO4 and Na2HPO4 is required?
b. What weight of each constituent is needed to prepare the buffer?
An ammonia buffer pH 7.60 with a concentration of 1.20 X 10-2 mol/L is required.
The Kb for NH4OH is 1.79 X 10-5. The desired volume is 500 mL.
a. What concentration of NH4OH and NH4Cl are required?
b. What weight of NH4Cl is needed?
How many milliliters of NH4OH with a S.G. 0.950 and percent purity of 28.0
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