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Asam formiat mengalami reaksi kesetimbangan menurut persamaan berikut. HCOOH ( a q ) ⇌ H + ( a q ) + HCOO − ( a q ) K = 1 , 8 × 1 0 − 4 Jika HCOOH mempunyai konsentrasi sebesar 0,002 M, tentukan: Konsentrasi ion OH − dan H + dalam larutan tersebut ( K w ​ air = 1 0 − 14 ).

Asam formiat mengalami reaksi kesetimbangan menurut persamaan berikut.

 

Jika HCOOH mempunyai konsentrasi sebesar 0,002 M, tentukan:

Konsentrasi ion  dan  dalam larutan tersebut ().

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konsentrasi dan .

konsentrasi begin mathsize 14px style bold left square bracket bold H to the power of bold plus bold right square bracket bold equals bold 6 bold cross times bold 10 to the power of bold minus bold 4 end exponent bold space bold M end style dan Error converting from MathML to accessible text.

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Berdasarkan soal diketahui : Menentukan konsentrasi Menentukan konsentrasi Jadi, konsentrasi dan .

Berdasarkan soal diketahui :

K subscript a double bond K equals 1 comma 8 cross times 10 to the power of negative sign 4 end exponent M subscript a equals 0 comma 002 space M equals 2 cross times 10 to the power of negative sign 3 end exponent space M K subscript w space air equals 10 to the power of negative sign 14 end exponent

Menentukan konsentrasi open square brackets H to the power of plus sign close square brackets

open square brackets H to the power of plus sign close square brackets equals square root of K subscript a cross times M subscript a end root open square brackets H to the power of plus sign close square brackets equals square root of open parentheses 1 comma 8 cross times 10 to the power of negative sign 4 end exponent close parentheses cross times open parentheses 2 cross times 10 to the power of negative sign 3 end exponent close parentheses end root space M open square brackets H to the power of plus sign close square brackets equals square root of 3 comma 6 cross times 10 to the power of negative sign 7 end exponent end root space M open square brackets H to the power of plus sign close square brackets equals square root of 36 cross times 10 to the power of negative sign 8 end exponent end root space M open square brackets H to the power of plus sign close square brackets equals open parentheses 6 squared cross times 10 to the power of negative sign 8 end exponent close parentheses to the power of begin inline style 1 half end style end exponent space M open square brackets H to the power of plus sign close square brackets equals 6 cross times 10 to the power of negative sign 4 space end exponent M
 

Menentukan konsentrasi open square brackets O H to the power of minus sign close square brackets

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open square brackets O H to the power of minus sign close square brackets end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator K subscript w over denominator open square brackets H to the power of plus sign close square brackets end fraction end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open square brackets O H to the power of minus sign close square brackets end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator 10 to the power of negative sign 14 end exponent over denominator 6 cross times 10 to the power of negative sign 4 end exponent end fraction end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open square brackets O H to the power of minus sign close square brackets end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 1 over 6 end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cross times end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 10 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell blank to the power of negative sign 10 end exponent end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank M end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open square brackets O H to the power of minus sign close square brackets end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 1 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank comma end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cross times end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 10 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell blank to the power of negative sign 11 end exponent end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank M end table end style    


Jadi, konsentrasi begin mathsize 14px style bold left square bracket bold H to the power of bold plus bold right square bracket bold equals bold 6 bold cross times bold 10 to the power of bold minus bold 4 end exponent bold space bold M end style dan Error converting from MathML to accessible text.

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