InterviewSolution
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InterviewSolution
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`25.3 g` sodium carbonate, `Na_(2)CO_(3)`, was dissolved in enough water to make `250 mL` of solution. If sodium carbonate dissociates completely, molar concentration of `Na^(+)` and carbonate ions are respectively:A. 0.955 M and 1.910 MB. 1.910 M and 0.955 MC. 1.90 M and 1.910 MD. 0.477 and 0.477 M |
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Answer» Correct Answer - B Molarity `(M )=(wt)/(mol .wt.) (1000)/(vol (ml))` `=(25.3)/(106)xx(1000)/(250)` `=.955mol//L`of `Na_(2)CO_(3)` and `Na_(2)CO_(3) to 2Na^(+)+CO_(3)^(-2)` therefore`[Na^(+)]=2xx0.955=1.910M` `[CO_(3)^(-2)]=0.955M` |
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