Odpowiedź :
Mr = 200g
Cp= 5%
Cp= Ms*100%/Mr
Ms= Cp*Mr/100%
Ms= 5% *200g / 100%
Ms= 10g <- NaOH
Mroz = Mr-Ms
Mroz= 200g-10g
Mroz= 190g <- woda
Cp= 5%
Cp= Ms*100%/Mr
Ms= Cp*Mr/100%
Ms= 5% *200g / 100%
Ms= 10g <- NaOH
Mroz = Mr-Ms
Mroz= 200g-10g
Mroz= 190g <- woda
x - ilość wodorotlenku sodu (w gramach)
200g - masa roztworu
5% - Cp (stężenie procentowe)
Cp = ms/mr * 100%
5% = x/200g * 100%
5% = x/2
x/2 = 5% /*2
x = 10g
200g - 10g = 190g
200g - masa roztworu
5% - Cp (stężenie procentowe)
Cp = ms/mr * 100%
5% = x/200g * 100%
5% = x/2
x/2 = 5% /*2
x = 10g
200g - 10g = 190g