Question

Calculate pH of 10^-5 M-HCl

Answer 1

Answer:

$\displaystyle \text{pH =5 }$

Explanation:

$\displaystyle \text{Given : }$

$\displaystyel \text{Molarity of HCl is 10^{-5} M}$

$\displaystyle \text{We have to calculate pH :}$

$\displaystyle \text{We know molarity is term of concentration .}$

$\displaystyle \text{We have formula for finding pH value :}$

$\displaystyle \text{pH =-\log\left[H^{+}\right] }$

$\displaystyle \text{Putting value in formula now}$

$\displaystyle \text{pH =-\log\left[10^{-5}\right] }\\\\\displaystyle \text{Using log formula :}\\\\\displaystyle \log m^n=n\log m\\\\\displaystyle \text{pH =-\times-5\log10 }\\\\\displaystyle \text{pH =5\log10 }\\\\\displaystyle \text{We know value of \log10=1 }\\\\\displaystyle \text{pH =5\times1 }\\\\\displaystyle \text{pH =5 }$

$\displaystyle \text{Thus we get answer .}$