Answered

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Additional Practice Questions

5. If you had a pH of 4.30 in a 5.00 L sample, how many
moles of hydronium do you have?

Sagot :

ardni313

Moles of hydronium (H₃O⁺) : 2.5 x 10⁻⁴

Further explanation

Given

pH = 4.3

V sample = 5 L

Required

moles of H₃O⁺(hydronium)

Solution

pH = - log [H₃O⁺]

4.3 = - log [H₃O⁺]

[tex]\tt [H_3O^+]=10^{-4.3}~M=10^{-4.3}mol/L[/tex]

Moles of hydronium for 5 L sample :

[tex]\tt 5~L\times 10^{-4.3}mol/L=5.10^{-4.3}moles=2.5\times 10^{-4}~moles[/tex]

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