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Hitunglah konsentrasi ion  dari 100 mL larutan  M!

Hitunglah konsentrasi ion begin mathsize 14px style O H to the power of minus sign end style dari 100 mL larutan begin mathsize 14px style Ba open parentheses O H close parentheses subscript 2 space 5 cross times 10 to the power of negative sign 4 end exponent end style M!

Jawaban:

begin mathsize 14px style Ba open parentheses O H close parentheses subscript 2 yields Ba to the power of 2 plus sign and 2 O H to the power of minus sign open square brackets O H to the power of minus sign close square brackets equals 2 open square brackets Ba open parentheses O H close parentheses subscript 2 close square brackets open square brackets O H to the power of minus sign close square brackets equals 2 cross times 5 cross times 10 to the power of negative sign 4 end exponent open square brackets O H to the power of minus sign close square brackets equals 10 to the power of negative sign 3 end exponent space M end style

Dengan demikian, maka jawaban yang tepat adalah begin mathsize 14px style 10 to the power of negative sign 3 end exponent end style M.

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