Name the sodium compound which is used for softening hard water.

(a) The recovery of silver nitrate solution involves displacement by copper metal. Write the equation of the reaction that takes place. Give the states of all the substances. (b) Under what soil conditions do you think a farmer would treat the soil in his fields with quicklime ? Why? (c) Name one sodium compound which is used for softening hard water and another which is used in fire extinguishers.

Which one of the following sodium compounds is used for softening hard water?

(a) Name a sodium compound used for softening hard water. (b) Which compound of calcium is used for disinfecting drinking water supply? (c) Name a metal compound which has detergent properties (cleansing properties). (d) Name one compound of calcium which is used for removing the colour of a coloured cloth. (e) State a peculiar (or remarkable) property of plaster of paris. (f) Name the substance obtained by the action of chlorine on solid (dry) slaked lime.

Fill in the blanks: The sodium compound used for softening hard water is _________

Describe calgon process used for softening of hard water.

Chemical compound that can be used to soften hard water.

(a) Which compound of sodium is used for softening hard water? (b) What is the effect of heat on the compounds ? (Write equations for the reactions): (c ) Draw the structure of : (i) BeCI_(2) (in vapour state) (ii) BeCI_(2) (in solid state)