`RH_2` (ion exchange resin) can replace `Ca^(2+)` ions in hard water as `RH_2+Ca^(2+)rarr RCa+2H^+`. If 1 L of hard water after passing through `RH_2` has `pH=3` then hardness in parts per million of `Ca^(2+)` is :

Van't Hoff factor of Ca(NO_3)_2 is :

The well known mineral fluorite is chemically clacium fluoride. Its is known that in one unit cell of this mineral there are 4 Ca^(2+) ions and 8 F^- ions and that of Ca^(2+) ions are arranged in a fcc lattice. The F^- ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. the edge of hte unit cell is 5.46xx10^-8 cm in length. the density of the solid is 3.18 gcm^-3 . use this information to calculate the Avagadro's number. (Molar mass of CaF_2=70.08 g mol^-1 ).

Calculate the percentage composition of Ca(NO_(3))_(2)

One litre of a sample of hard water contain 4.44mg CaCl_(2) and 1.9mg "of" MgCl_(2) . What is the total hardness in terms of ppm of CaCO_(3)?

Ca(OH)_2 solution has pH greater than 7. Is it true or false?

Balance the following chemical equations: HNO_3 +Ca(OH)_2rarr Ca(NO_3)2 + H_2O

Complete the following reaction : HNO_3 + Ca(OH)_2 rarr

Balance the following chemical equation: HNO3+Ca(OH)2rarr Ca(NO3)2+H2O

Write balanced equations for the following reaction : Ca_3P_2+ H_2O rarr