A solution of HCl has a concentration of 1.20 x 10-2 M. What is the pH of this solution?

Chemistry

2 answers:

nalin [4]3 years ago

5 0

Answer: The pH of the solution is 1.92

Explanation:

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

Hydrochloric acid is a monoprotic acid and it dissociates 1 mole of hydrogen ions. So, the concentration of hydrogen ions is $1.20\times 10^{-2}M$

$[H^+]=1.20\times 10^{-2}M$

Putting values in above equation, we get:

$pH=-\log(1.20\times 10^{-2})\\\\pH=1.92$

Hence, the pH of the solution is 1.92

Westkost [7]3 years ago

3 0

-log (1.2x10^-2) = 1.92 so C

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$We\ are\ given:\\No.\ of\ moles\ of\ H_2O\ provided=2.5\ moles\\Now,\\We\ know\ that,\\ Avagadro's\ Constant=6.022*10^{23}\\Now,\\We\ also\ know\ that:$

$No.\ of\ particles=No.\ of\ moles*Avagadro's\ Constant\\Hence,\ here,\\No.\ of\ molecules\ in\ 2.5\ moles\ of\ H_2O=2.5*6.022*10^{23}\\Hence,\\No.\ of\ molecules\ in\ 2.5\ moles\ of\ H_2O=15.055*10^{23}\ H_2O\ molecules\\Now,\\No.\ of\ molecules\ in\ 2.5\ moles\ of\ H_2O=1.5055*10^{24}\ H_2O\ molecules\\ or\ 1.51*10^{24}\ H_2O\ molecules$