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1/
.....Zn(OH)2.........+..........2HCl--------->ZnCl.........+..........2H2O
....6,02*10(23)cz..............2*36,5g
.........x..........................36,5g
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x = 6,02*10(23)cz.*36,5g /2*36,5g = 3,01*10(23) cząsteczek Zn(OH)2 trzeba
do zobojętnienia 36,5g HCl.
2/
W MgCl2 4g Mg łączą się z 11,8g Cl2 dając 15,8g MgCl2
%Mg = 4g*100%/15,8g = 25,32%
%Cl = 11,8g*100%/15,8g = 74,68%
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....................razem 100,00%
........................................pozdrawiam