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Solution containing Ions are…
conductive
What are the [ion] in 3.5M NaCl
NaCl → Na+ + Cl-
3.5M 3.5M 3.5M
1:1 ratios
What are the [ion] in 1.2M CuCl2?
CuCl2 → Cu2+ 2Cl-
1.2 1.2 2.4
What mass of MgBr2 must be disolved to make 2L with a [Br-] of 0.2M? (MgBr2 molar mass is 𝟏𝟖𝟒.𝟏𝟏𝟑
𝐠/mol)
MgBr2 → Mg+ + 2Br-
0.2M 0.2M 0.4M
mol = V*M
mol = 2×0.4
mol = 0.8
g = g/mol * mol
g= 𝟏𝟖𝟒.𝟏𝟏𝟑*0.8=147.29
g = 147.29