chem1008assignment9(April7)

chem1008assignment9(April7) - 4 Cl with 40.0 mL of 0.10M...

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CHEMISTRY 1008 Name: ________________________ Homework Assignment #9 Due: Thursday, April 7, 2011 1. (4 pts) The pH of human blood is 7.40. Assuming that the principle buffer system in blood is HCO 3 - /H 2 CO 3 , calculate the ratio [HCO 3 - ]/[H 2 CO 3 ]. (H 2 CO 3 K a = 4.2x10 -7 ) Is this buffer more effective against added acid or bases? (explain) 2. (6 pts) A buffer solution was produced by mixing 60.0 mL of 0.10M NH
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Unformatted text preview: 4 Cl with 40.0 mL of 0.10M NaOH. Given the K a of NH 4 + = 5.56x10-10 (a) Calculate the pH of the resulting solution. Assume that the resulting solution has a volume of 100.0 mL. (b) What would be the pH of solution if 3.00 mL of 0.50M HCl were added? Assume that the resulting solution has a volume of 103.0 mL....
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This note was uploaded on 04/29/2011 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell.

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