[" find out the PH "],[" samples ly "],[" jmoticator."],[" Dilute "Na_(2)CO]

A sample of hard water contains 20 mg of Ca^(2+) ions per litre. How many millimoles of Na_(2)CO_(3) would be requried to soften 1 L of the sample. Also calculate the mass of Na_(2)CO_(3) .

A sample of hard water contains 20 mg of Ca^(2+) ions per litre. How many millimoles of Na_(2)CO_(3) would be requried to soften 1 L of the sample. Also calculate the mass of Na_(2)CO_(3) .

What is the correct relation ship between the pH values of isomolar solution of Na_(2)(O(pH_(1)), Na_(2)S(pH_(2)), Na_(2)Se(pH_(3)) and Na_(2)Te(pH_(4)) ?

A sample contains a mixtrure of NaHCO_(3) and Na_(2)CO_(3) . HCl is added to 15.0 g .of the sample, yielding 11.0 g of NaCl . What percent of the sample is Na_(2)CO_(3) ? [{:("Reaction are"),(Na_(2)CO_(3) + 2HCl rarr 2NaCl + CO_(2) + H_(2) O),(NaHCO_(2) + HCl rarr NaCL + CO_(2) + H_(2) O):}] Mw "of" NaCl = 58.5, Mw "of" NaHCO_(3) = 84, Mw "of" Na_(2)CO_(3) = 106 g mol^(-1)

A sample contains a mixtrure of NaHCO_(3) and Na_(2)CO_(3) . HCl is added to 15.0 g .of the sample, yielding 11.0 g of NaCl . What percent of the sample is Na_(2)CO_(3) ? [{:("Reaction are"),(Na_(2)CO_(3) + 2HCl rarr 2NaCl + CO_(2) + H_(2) O),(NaHCO_(2) + HCl rarr NaCL + CO_(2) + H_(2) O):}] Mw "of" NaCl = 58.5, Mw "of" NaHCO_(3) = 84, Mw "of" Na_(2)CO_(3) = 106 g mol^(-1)

Find out the oxidation state of sodium in Na_2O_2 .

Find out the oxidation state of sodium in Na_2O_2 .

A sample of water from a river was analyzed for the presence of metal ions and the observations were recorded as given below {:("Reagent added","Observation"),("dil. HCl","No change"),("aq. " Na_(2)CO_(3),"White precipitate"),("Aq. " Na_(2)SO_(4),"No change"):} The water sample is likely to contain