What is the pH of 50.0 M HF and 25.0mL of 1.0 M NaOH?
The problem can't be worked because the M (or mL) of HF is not given.
HF + NaOH ==> NaF + HOH
moles HF initially = M x L = ??
moles NaOH initially = M x L = ??
Determine how much HF remains, how much F is formed, the use the Henderson-Hasselbalch equation to determine pH. .