Does changing the mass or volume of water change its density?

Find out the mass by volume percentage of 15percent of sulphuric acidof density of 1.02gm/mf in 100gm of water?

• find out the mass by volume percentage of 15percent of sulphuric acid of density of 1.02gm/mf in 100gm of water?

• Answer:

  The question is little bit confusing but let us try it anyways. You have 15% acid meaning 15 g/100 ml, the density is 1.02 g/ml, so the 15 g are in 102 g of solution. Now subtract the wt of acid from the total wt 102-15 = 87 g of water. All you do now is to find out how much of it will be present in 100 g water, 100*15/87 = 17.24 g/100 g water. The density of water is 1 g/ml, so the concentration will be 17.24 g/100 ml or 100 g water or 17.24% w/w or w/v basis.