`Ca^(2+)" and "Mg^(2+)`

A 50 mL sample of hard water containing Ca^(2+) and Mg^(2+) ions is titrated with 50 mL. 0.005 M EDTA solution at pH=10 , using eriochrome balck -T indicator to reach equivalence point. In a equal amount of hard water sample, Mg^(2+) ions are precipated as Mg(OH)_(2) by adding suitable amount of NaOH . the solution, after precipation of Mg(OH)_(2) , is strired and then titrated with EDTA solution using calcon as indicator, and it requires 10 mL of above EDTA solution to reach equivalence point. a. Calculate the strength of Ca^(2+) and Mg^(2+) ions present in hard water. b. Calculate the hardness due to Ca^(2+) ions in p p m of CaCO_(3) . c. Calculate the hardnesss due to Mg^(2+) ions in p p m of CaCO_(3) . d. Calculate the total hardness of water in p p m of CaCO_(3) .

A 50 mL sample of hard water containing Ca^(2+) and Mg^(2+) ions is titrated with 50 mL. 0.005 M EDTA solution at pH=10 , using eriochrome balck -T indicator to reach equivalence point. In a equal amount of hard water sample, Mg^(2+) ions are precipitated as Mg(OH)_(2) by adding suitable amount of NaOH . the solution, after precipitation of Mg(OH)_(2) , is stirred and then titrated with EDTA solution using calcon as indicator, and it requires 10 mL of above EDTA solution to reach equivalence point. a. Calculate the strength of Ca^(2+) and Mg^(2+) ions present in hard water. b. Calculate the hardness due to Ca^(2+) ions in p p m of CaCO_(3) . c. Calculate the hardness due to Mg^(2+) ions in p p m of CaCO_(3) . d. Calculate the total hardness of water in p p m of CaCO_(3) .

Which has the largest ionic radius Ca^(2+) , Mg^(2+) , Ba^(2+) ?

Which has the largest ionic radius Ca^(2+) , Mg^(2+) , Ba^(2+) ?

Group of ions are given below: Na^+ , Al^(3+) , O^(2-) , Ca^(2+) , Mg^(2+) , F^- , N^(3-) , Br(-) Two of the above ions are not isoelectronic. Identify them.

A group of ions are given below . Find one pair which is NOT isoelectronic. Na^(+) , Al^(3+) , O^(2-) , Ca^(2+) , Mg^(2+) , F^(-) , N^(3-) , Br^(-)

Which out of Ca(OH)_2 and Mg(OH)_2 is more soluble in water and why ?

Two samples of hard water contain same cations, Ca^(2+) & Mg^(2+) . One is marked as temporary and the other as permanent. In which respect do they differ?