100 mL of a water sample contains 0.81g of calcium bicarbonate and 0.73g of magnesium bicarbonate. The hardness of this water sample expressed in terms of equivalent of `CaCo_3` is `10^x` ppm. What is numerical value of x? (molar mass of calcium bicarbonate is `162 gmol^(-1)` and magnesium bicarbonate is `146g mol^(-1))`
the hardness of a water sample (in terms of Equivalents of CaCO_(3) ) containing 10^(-3)MCaSO_(4) Is : (Molar mass of CaSO_(4)=1365h mol^(-1) )
One litre of a sample of hard water contains 1.62g of calcium hydrogen carbonte. What amount of lime is needed to remove hardness of 10^(6) litres of such a sample
One litre of a sample of hard water contains 1 mg of CaCl_(2) and 1 mg of MgCl_(2) . Find the total hardness of water in terms of parts of CaCO_(3) per 10^(6) parts of water by mass.
A sample ofsea water contains 5xx10^(-3)g of dissolved oxygen in 1 kg of the sample. The concentration of O_(2) in that sea water sample in ppm is
10 L of hard water requires 0.28 g of line (CaO) for removing hardness. Calculate the temporary hardness in ppm of CaCO_(3) .
The hardness of a water sample containing 10^(-3)M MgSO_(4) expressed as CaCO_(3) equivalents (in ppm) is ""_____________ (Molar mass of MgSO_(4) is 120.37 g//mol)
A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid release 0.25 ml of CO_2 at T=298.15 K and p=1 bar. If molar volume of CO_2 is 25.0L under such condition, the number of mole of sodium bicarbonate in each tablet is 10^(-x) . What is numerical value of x. [Molar mass of NaHCO_3 =84 g mol^(-1) ]
