Asked by Nancy

a 350ml buffer solution is .150M in HF and .150M in NAF. What mass of naoh could this buffer neutralize before ph rises above 4.0?
So far I got .285714 from 10^-.544.
After that I tried to do .285714(x/.0525-x) but this doesn't worl. The answer is 1.2g. Help, please?

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