1.

25.3 g of sodium carbonate, Na_(2)CO_(3) is dissolved in enough water to make 250 mL of solution. If sodium carbonate completely, molar concentration of sodium ions, Na^(+) and carbonate ions, CO_(3)^(2-) are respectively (Molar mass of Na_(2)CO_(3)=106g mol^(-1))

Answer»

0.477 M and 0.477 M
0.955 M and 1.910 M
1.910 M and 0.955 M
1.90 M and 1.910 M

Solution :`"Molarity of the solution"=(25.3)/(106)XX(1000)/(250)=0.955M`
`Na_(2)CO_(3)rarr2Na^(+)+CO_+(3)^(2-)`
`therefore""[Na^(+)]=2xx0.955M=1.910M`
`[CO_(3)^(2-)]=0.955M.`


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