calculate the ph of a 0.00040 m solution of hbr at 25.0 °c.
calculate the ph of a 0.00040 m solution of hbr at 25.0 °c.
Answer
Explanation:
Step1: Identify H⁺ concentration
HBr is a strong - acid and completely dissociates in water. So, $[H^+]=[HBr]=0.00040\ M$.
Step2: Calculate pH
The formula for pH is $pH = -\log[H^+]$. Substitute $[H^+]=0.00040\ M$ into the formula: $pH=-\log(0.00040)$. $pH = -\log(4.0\times 10^{- 4})=4-\log4$. Since $\log4\approx0.6021$, then $pH = 3.3979\approx3.40$.
Answer:
3.40