What is the pH of 5 - 10-8 N HCl -A- 6-5B- 5-5C- 5-95D- 6-95

HCl⇌ H^++ Cl^ [H^+]_from HCl=5× 10^ 8H_2O ⇌ H^++ OH^ (x+5× 10^ 8) x [H^+] [OH^ ]=10^ 14 (x+5× 10^ 8) x=10^ 14 (x+5× 10^ 8)x 10^ 14=0 x^2+5× 10^ 8x 10^ ...

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Standard XII

Chemistry

Properties of Water

What is the p...

Question

What is the pH of $5 \times 10^{- 8} N H C l ?$

5.95

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6.95

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6.5

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5.5

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Solution

The correct option is B 6.95
$H C l ⇌ H^{+} + C l^{-}$
$[H^{+}]_{f r o m H C l} = 5 \times 10^{- 8}$ $H_{2} O ⇌ H^{+} + O H^{-} (x + 5 \times 10^{- 8}) x [H^{+}] [O H^{-}] = 10^{- 14} (x + 5 \times 10^{- 8}) x = 10^{- 14} (x + 5 \times 10^{- 8}) x - 10^{- 14} = 0 x^{2} + 5 \times 10^{- 8} x - 10^{- 14} = 0 S o l v i n g, x = 7.8 \times 10^{- 8} p H = - l o g_{10} (x + 5 \times 10^{- 8}) p H = - l o g_{10} (7.8 \times 10^{- 8} + 5 \times 10^{- 8}) p H = 6.95$

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Similar questions

p H

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[\begin{matrix} 10^{- 6.95} = 11.22 \times 10^{- 8} 10^{- 7.05} = 8.90 \times 10^{- 8} \end{matrix}]

K_{w} f o r H_{2} O i s 9.62 \times 10^{- 14} a t 60^{\circ} C

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Properties of Water

Standard XII Chemistry

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What is the pH of 5×10−8 N HCl ?

The correct option is B 6.95HCl⇌H++ Cl− [H+]from HCl=5×10−8H2O⇌H++ OH− (x+5×10−8) x[H+] [OH−]=10−14(x+5×10−8)x=10−14(x+5×10−8)x−10−14=0x2+5×10−8x−10−14=0Solving, x=7.8×10−8pH=−log10(x+5×10−8)pH=−log10(7.8×10−8+5×10−8)pH=6.95

What is the pH of $5 \times 10^{- 8} N H C l ?$