It is desired to change pH of 0.05 M acetic acid solution to 1.5 times pH value, the solution should be diluted to

# It is desired to change pH of 0.05 M acetic acid solution to 1.5 times pH value, the solution should be diluted to

1. A

540.5

2. B

870.5

3. C

1033.3

4. D

1150.0

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### Solution:

$\mathrm{pH}=1.5×3.02=4.53$

$\left[{\mathrm{H}}^{+}\right]-\left({10}^{-\mathrm{pH}}\right)\mathrm{M}-2.95×{10}^{-5}\mathrm{M}$

$c-{\left[{\mathrm{H}}^{+}\right]}^{2}/{K}_{\mathrm{a}}-{\left(2.95×{10}^{-5}\mathrm{M}\right)}^{2}/\left(1.8×{10}^{-5}\mathrm{M}\right)-4.84×{10}^{-5}\mathrm{M}$

Dilution factor $=\frac{0.05\mathrm{M}}{4.84×{10}^{-5}\mathrm{M}}=1033.3$

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