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cofaaaaaa
@cofaaaaaa
August 2022
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m-ра=300гW(Hcl)=20%m(NAOH)-?
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khirurg
M вещ.=300г. *0,2=60г
m(Naoh)=300-60=240г
0 votes
Thanks 1
cofaaaaaa
Благослови бог твою душу!
cofaaaaaa
это точно?
Alexei78
Дано
m(ppa HCL)=300 g
W(HCL)=20%
-----------------------
m(NaOH)-?
m(HCL)=300*20%/100%=60 g
60 X
HCL+NaOH-->NaCL+H2O M(HCL)=36.5 g/mol , M(NaOH)=40 g/mol
36.5 40
X=60*40 / 36.5=65.75 g
ответ 65.75 г
0 votes
Thanks 1
cofaaaaaa
это точно?
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Answers & Comments
m(Naoh)=300-60=240г
m(ppa HCL)=300 g
W(HCL)=20%
-----------------------
m(NaOH)-?
m(HCL)=300*20%/100%=60 g
60 X
HCL+NaOH-->NaCL+H2O M(HCL)=36.5 g/mol , M(NaOH)=40 g/mol
36.5 40
X=60*40 / 36.5=65.75 g
ответ 65.75 г