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# ws10302 - CH 302 Worksheet 10 1 NaH2PO4(conc = CNaH2PO4 is...

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CH 302 Worksheet 10 1. NaH 2 PO4 (conc. = C NaH2PO4 ) is dissolved in water. Write the mass balance equation for this system. 2. Write the charge balance equation for the solution in question 1. 3. Write the charge balance equation for a solution containing all of the following ions: H + , OH - , Na + , Ba 2+ , PO 4 3- , Ag 3+ , SO 4 2- , and COOH - . 4. NaH 2 PO 4 , LiHCO 3 , HCl, NaCl, and LiOH are all dissolved in water. How many equations are needed to completely describe this system? 5. Write a charge balance equation for the system described in question 4. 6. Write the mass balance equation for H 2 CO 3 (conc. = C H2CO3 ) in water. 7. Find the pH of 10 -8 M HCl like you would have for the last two quizzes. Then find it using the exact expression, [H + ] 2 – [H + ]C HCl – K w = 0. Compare the two answers. 8. Repeat the same thing as in question 7, this time for 10 -2 M HCl. 9. Assuming an appropriate C HCl , derive the approximate equation for a strong acid, [H + ] = C a , from the expression given in question 6.

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ws10302 - CH 302 Worksheet 10 1 NaH2PO4(conc = CNaH2PO4 is...

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