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anonymous
 one year ago
A pH 4.10 Soln can be made by mixing HF and LiOH in water. What mass (g) of LiOH(s) must be added to 1L of 0.160M HF(aq) prepare in this solution. (Assume no volume change in addition of solid LiOH
anonymous
 one year ago
A pH 4.10 Soln can be made by mixing HF and LiOH in water. What mass (g) of LiOH(s) must be added to 1L of 0.160M HF(aq) prepare in this solution. (Assume no volume change in addition of solid LiOH

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cuanchi
 one year ago
Best ResponseYou've already chosen the best response.0Are you familiar with the HendersonHasselbalch Approximation for a buffer? pH=pKa+log([A−]/[HA]) you also will need the Ka of HF acid Name Formula K a pKa Hydrofluoric acid HF 6.3 × 10−4 3.20

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0This is exactly what I used using that I get 32 grams mass LiOH

cuanchi
 one year ago
Best ResponseYou've already chosen the best response.0I think that the value is a little high. Check your calculations. and let me know how did you do. You have there 1.3 mol LiOH in 32g and in your problem you have only 0.160 mol of HF acid. You will have excess of LiOH (1.30.160)=1.14 mol OH => pH> 14

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah I understand the answer is wrong that's why I posted it. I've tried going over it and I get the same thing @cuanchi

cuanchi
 one year ago
Best ResponseYou've already chosen the best response.0how do you do? can you show me your steps
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