Question: Advance function 9,10 with full answer and handwriting 9. The pH ofa solution is calculated by using the formula pH = -log[H* ] , where

Advance function 9,10 with full answer and handwriting

9. The pH ofa solution is calculated by using the formula pH = -log[H* ] , where [H'] is the concentration of the hydronium ions. [4 I a} If the pH ofa solution is 4.2, what is the concentration of the hvdronium ions? b) A strong acid has a pH less than 3. If the concentration of the hydronium ions is 1.6x 10" in a particular solution, is the solution a strong acid? Explain. 10. An investment of $2000 earns interest at a rate of 3.6%la compounded monthly. Another investment of $2500 earns interest at a rate of 3.0%la compounded semi-annually. How long, if ever, will it take for the lower initial investment to be worth more than the higher one? Solve algebraically. [4]

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