Which solution contains the biggest amount, in mol, of chloride ions? A. 20 cm3 of 0.50 mol dm−3 NH4Cl B. 60 cm3 of 0.20 mol dm−3 MgCl2 C. 70 cm3 of 0.30 mol dm−3 NaCl D. 100 cm3 of 0.30 mol dm−3 ClCH2COOH

Md Ariful Islam

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And to answer the question, we must calculate the of of each solution with respect to chloride ions.

And $"number of moles"="concentration"xx"volume"$

For $(a):$ there are $0.020*dm^3xx0.50*mol*dm^-3=0.01*mol$.

For $(b):$ $0.060*dm^3xx0.20*mol*dm^-3xx"2 equiv"=0.024*mol$.

For $(c):$ $0.070*dm^3xx0.30*mol*dm^-3=0.021*mol$.

For $(d):$ THERE ARE NO CHLORIDE IONS IN SOLUTION. Why not?

Why did I double the quantity in $(b)$?

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