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Hitunglah campuran pada: 250 mL 0,05 M dicampurka...

Hitunglah begin mathsize 14px style open square brackets O H to the power of minus sign close square brackets end style campuran pada:

250 mL begin mathsize 14px style Ba open parentheses O H close parentheses subscript 2 left parenthesis italic a italic q right parenthesis end style 0,05 M dicampurkan dengan 750 mL begin mathsize 14px style N H subscript 4 O H left parenthesis italic a italic q right parenthesis end style 0,04 M begin mathsize 14px style open parentheses K subscript b equals 10 to the power of negative sign 5 end exponent close parentheses end style space

Jawaban:

Menghitung mol ion hidroksida dalam barium hidroksida:


begin mathsize 14px style open square brackets O H to the power of minus sign close square brackets equals 2 cross times 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 0 comma 05 open square brackets O H to the power of minus sign close square brackets equals 0 comma 1 space M mol space O H to the power of minus sign equals open square brackets O H to the power of minus sign close square brackets cross times V mol space O H to the power of minus sign equals 0 comma 1 space M cross times 0 comma 25 space L mol space O H to the power of minus sign equals 0 comma 025 space mol end style


Menghitung mol ion hidroksida dalam amonium hidroksida:


begin mathsize 14px style open square brackets O H to the power of minus sign close square brackets equals square root of K subscript b cross times open square brackets N H subscript 4 O H close square brackets end root open square brackets O H to the power of minus sign close square brackets equals square root of 10 to the power of negative sign 5 end exponent cross times 0 comma 04 end root open square brackets O H to the power of minus sign close square brackets equals square root of 4 cross times 10 to the power of negative sign 7 end exponent end root open square brackets O H to the power of minus sign close square brackets equals 6 comma 32 cross times 10 to the power of negative sign 4 end exponent space M mol space O H to the power of minus sign double bond open square brackets O H to the power of minus sign close square brackets cross times V mol space O H to the power of minus sign equals 6 comma 32 cross times 10 to the power of negative sign 4 end exponent space M cross times 0 comma 75 space L mol space O H to the power of minus sign equals 4 comma 74 cross times 10 to the power of negative sign 4 end exponent space mol end style


Menghitung konsentrasi ion hidroksida dalam campuran:


 begin mathsize 14px style open square brackets O H to the power of minus sign close square brackets equals fraction numerator mol space total over denominator V space total end fraction open square brackets O H to the power of minus sign close square brackets equals fraction numerator left parenthesis 0 comma 025 plus 4 comma 74 cross times 10 to the power of negative sign 4 end exponent right parenthesis space mol over denominator left parenthesis 0 comma 25 plus 0 comma 75 right parenthesis space L end fraction open square brackets O H to the power of minus sign close square brackets equals fraction numerator 0 comma 025474 space mol over denominator 1 space L end fraction open square brackets O H to the power of minus sign close square brackets equals 0 comma 025474 space M end style 


begin mathsize 14px style bold Jadi bold comma bold space bold open square brackets O H to the power of bold minus sign bold close square brackets bold space bold dalam bold space bold campuran bold space bold adalah bold space bold 0 bold comma bold 025474 bold space italic M bold. end style space

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