# Numbers 8-10 8. Determine the pH of a solution in which 1.00 mol H2C03 (Ka 4.2...

###### Question:

numbers 8-10
8. Determine the pH of a solution in which 1.00 mol H2C03 (Ka 4.2 x 10-) and 1.00 mole NaHCOs are dissolved in enough water to form 1,00 L of solution. 9. How many moles of NaHCO3 should be added to one liter of 0.100 M H2CO3 (Ka4.2x 10-7) to prepare a buffer with pH 7.00? 10) Determine the pH of 0.01 M NH3 (Kb= 1.8 x 10-5) when an equal volume of 0.05 M NH4Cl is added. Determine the pH of an HCN/KCN buffer containing 0.10 mole HCN and 0.07 mole KCN before and after the adition of 0.001 mol HC1 to one liter of buffer. (Ka 4.79 x 10-10 12. 1f25 ml of 02 M NaOH is added to 50 mL of o.1 MCH3COOH (Ka 18 x 10-5), what is the pH?

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