Question

explain as to why there is an increase in temperature observed on mixing water sulphuric acid
calculate molarity of an aqueous solution of ki having density 1.202 g /cm3 containing 20 percent ki by mass

Answer 1

Answer :

2.04 mol/L

Explanation:

% w / w = Mass of solute

________________

Mass of solution×100

20%w/w means 20 g of sulfuric acid is present in 100 g of water

Density of water = 1 g/mL

Volume of water in given solution =

 100 g

_____ =100 mL=0.1 L

1 g/mL

Molar mass of H2SO4=98 g/mol

Moles of H2SO4 in given solution = 

20 g 10

_______ = __ mol

98 g/mol 49

Molarity = Mole of solute

____________________

Volume of solution (In litres)

Molarity = 10

___ = mol

49

__________ = 2.04 mol/L

0.1 L