15.9 of copper sulphate and 10.6 g of sodium carbonate react together to give 14.2 g of sodium sulphate and 12.3 g of copper carbonate . Which law of chemical combinations is obeyed ? How?

Carbon dioxide is added to 112 g of calcium oxide. The product formed is 200 g of calcium carbonate. Calculate the mass of carbon dioxide used. Which law of chemical combination will govern your answer?

4.9 g of H_2SO_4 decompedes x.g of NaCl to give 5g of sodium hydrogen sulphate and 1.825g of hydrochloric acid. Then .x. is

In a reaction 5.3 g of sodium carbonate reached with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide , 0.9 g if water and 8.2 g of sodium ethanoate. Show that these observations are in agreement with law of conservation of mass.

100kg of a water sample contains 6g of magnesium sulphate, 10.2g of calcium sulphate and 16.2 g of calcium bicarbonate only. Calculate permanent hardness, temporary hardness and total hardness.

How may gram of 83.4% pure sodium sulphate can be produced form 250 g of 95% pure NaCl.

How many moles are present in (a) 5.08g of sodium bicarbonate (b) 16.3g of rhombic sulphur ( c) 6.46 g og helium and (d) 23.3g of zine

Potassium nitrate and sodium nitrate reacts separately with copper sulphate solution. Write balanced chemical equations for the above reactions.

The approximate production of sodium carbonate per month is 424xx10^(6) g. While that of methyl alcohol is 320xx10^(6) gm. Which is produced more in terms of moles ?

Collect the salt samples like sodium chloride, aluminium chloride, copper sulphate, sodium acetate, ammonium chloride, sodium hydrogen carbonate and sodium carbonate. Dissolve them in distilled water. Check the action of these solutions with litmus papers. Find the pH using pH paper. Classify them into acidic, basic or neutral salts. Identify the acid and base used to form the above salts. Record your observations in table

What is the minimum volume of water required to dissove 1g of calcium sulphate at 298K ? (For calcium sulphate, K_(sp) is 9.1xx10^(-6) ).