Roboguru

Di dalam larutan terdapat yang terlarut. Jika nilai dan dan maka pH yang terjadi adalah...

Di dalam begin mathsize 14px style 500 space mL end style larutan terdapat begin mathsize 14px style 4 comma 1 space gram space C H subscript 3 C O O Na end style yang terlarut. Jika nilai begin mathsize 14px style K subscript a space C H subscript 3 C O O H equals 10 to the power of negative sign 5 end exponent end style dan begin mathsize 14px style Ar space Na equals 23 comma end style  begin mathsize 14px style C equals 12 comma end style dan begin mathsize 14px style O equals 16 comma end style maka pH yang terjadi adalahundefined...

  1. begin mathsize 14px style 3 end style 

  2. begin mathsize 14px style 4 end style 

  3. begin mathsize 14px style 5 end style 

  4. begin mathsize 14px style 9 end style 

  5. begin mathsize 14px style 10 end style 

Jawaban:

  • Menghitung molaritas begin mathsize 14px style C H subscript 3 C O O Na end style:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row M equals cell massa over Mr cross times 1000 over volume end cell row blank equals cell fraction numerator 4 comma 1 over denominator 82 end fraction cross times 1000 over 500 end cell row blank equals cell 0 comma 1 space M end cell row blank equals cell 1 cross times 10 to the power of negative sign 1 end exponent space M end cell end table end style  

 

begin mathsize 14px style C H subscript 3 C O O Na end style merupakan garam basa, maka

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell square root of K subscript italic w over K subscript italic a cross times open square brackets C H subscript 3 C O O Na close square brackets end root end cell row blank equals cell square root of 10 to the power of negative sign 14 end exponent over 10 to the power of negative sign 5 end exponent cross times 10 to the power of negative sign 1 end exponent end root end cell row blank equals cell square root of 10 to the power of negative sign 10 end exponent end root end cell row blank equals cell 10 to the power of negative sign 5 end exponent end cell end table end style 
 

  • Menghitung pOH

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row pOH equals cell negative sign log space open square brackets O H to the power of minus sign close square brackets end cell row blank equals cell negative sign log space 10 to the power of negative sign 5 end exponent end cell row blank equals 5 end table end style 
 

  • Menghitung pH

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row pH equals cell 14 minus sign pOH end cell row blank equals cell 14 minus sign 5 end cell row blank equals 9 end table end style 


Jadi, jawaban yang benar adalahspaceD.

0

Ruangguru

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ikuti Kami

©2021 Ruangguru. All Rights Reserved