What is the $p H$ $pH$ for a $0.020 \cdot m o l \cdot L^{- 1}$ $0.020molL^-1$ solution of $H C l (a q)$ $HCl(aq)$ ?

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What is the $p H$ $pH$ for a $0.020 \cdot m o l \cdot L^{- 1}$ $0.020molL^-1$ solution of $H C l (a q)$ $HCl(aq)$ ?

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Answer 1 · 2016-09-14T18:24:59

$p H = 1.70$ $pH=1.70$

Explanation:

$p H = - {log}_{10} [H_{3} O^{+}]$ $pH=-log_10[H_3O^+]$

$=$ $=$ $- {log}_{10} (0.02)$ $-log_10(0.02)$ , given that we assume hydrochloric acid dissociates completely to give stoichiometric $H_{3} O^{+} (a q)$ $H_3O^+(aq)$ :

$H C l (a q) + H_{2} O (l) ⇌ H_{3} O^{+} + C l^{-}$ $HCl(aq) +H_2O(l) rightleftharpoons H_3O^+ + Cl^-$

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What is the $p H$ $pH$ for a $0.020 \cdot m o l \cdot L^{- 1}$ $0.020molL^-1$ solution of $H C l (a q)$ $HCl(aq)$ ?

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What is the $p H$ $pH$ for a $0.020 \cdot m o l \cdot L^{- 1}$ $0.020molL^-1$ solution of $H C l (a q)$ $HCl(aq)$ ?