1.

A 0.1 M basic solution is required from Ca(OH)_(2) is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, Na^(+) and carbonate ions, CO_(3)^(2-) are respectively (Molar mass of Na_(2)CO_(3)=106"g mol"^(-1))

Answer»

`0.125M`
`0.25M`
`0.4M`
`0.5M`

Solution :As 1 mole of `CA(OH)_(2)` PRODUCES 2 moles of `OH^(-)` ions, therefore, if it were completely ionized.to get 0.1 M `OH^(-)` ions, `Ca(OH)_(2)` solution required WOULD have been = 0.05 M.


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