List of top Chemistry Questions on water

A sample of water is known to contain \(Mg(HCO_3)_2=7.3\ \text{mg/L\), \(Ca(HCO_3)_2=8.1\ \text{mg/L}\), and \(27.2\ \text{mg/L}\) of \(CaSO_4\). The total hardness associated with water sample in ppm in equivalents of \(CaCO_3\) is \[ (\text{At.wt. }H=1,\ C=12,\ O=16,\ Mg=24,\ Ca=40,\ S=32) \] }
What is the degree of hardness in ppm of a sample containing \(19\text{ mg}\) of \(MgCl_2\) molecular weight \(=95\) in \(2\text{ kg}\) water sample? Express it in terms of equivalents of \(CaCO_3\).
Identify the pair of chlorides responsible for permanent hardness of water.
In the removal of permanent hardness of water by permutit process, \(Na^+\) ions of permutit are exchanged with which ions of water?
In the removal of permanent hardness of water by permutit process, \(Na^+\) ions of permutit are exchanged with which ions of water?
What is the degree of hardness in ppm of a sample containing \(19\text{ mg}\) of \(MgCl_2\) molecular weight \(=95\) in \(2\text{ kg}\) water sample? Express it in terms of equivalents of \(CaCO_3\).
Identify the pair of chlorides responsible for permanent hardness of water.
What is the volume occupied by 1 molecule of water, if its density is 1 g/cm$^3$?
Which one of the following removes temporary hardness of water?
Water gas is produced by
Identify the structure of water in the gaseous phase.
The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8H_7SO_3Na$ (molecular weight = $206$). What would be the maximum uptake of $Ca^{2+}$ ions by the resin when expressed in mole per gram resin
Which one of the following removes temporary hardness of water?