http://i47.tinypic.com/11vmibr.jpg prosilbym o rozwiazanie zadania 8
Na2SO4 x 10 H20
M(H20) = 18g/mol
M(Na2SO4)= 142g/mol
M(Na2SO4 x 10 H20)= M(Na2SO4) + 10x M(H20) = 142g + 10x 18g = 322g
masa hydratu = 322g
masa wody w hydracie - 10x 18g
322g (Na2SO4 x 10 H20) - 100%
10x 18g (H20) - x
x= 55,9 % wody w hyracie
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Na2SO4 x 10 H20
M(H20) = 18g/mol
M(Na2SO4)= 142g/mol
M(Na2SO4 x 10 H20)= M(Na2SO4) + 10x M(H20) = 142g + 10x 18g = 322g
masa hydratu = 322g
masa wody w hydracie - 10x 18g
322g (Na2SO4 x 10 H20) - 100%
10x 18g (H20) - x
x= 55,9 % wody w hyracie