1.If the density of water of lake is 1.25g/ml and One kg of lake water contains 92g of Na+ ions.
Calculate the molarity of Na+ions in this lake water.

Asked by Prakash | 28th Nov, 2017, 10:20: PM

Expert Answer:

   
space space space space space space space space Molarity space equals fraction numerator No. space of space moles over denominator Mass space of space solvent space in space Kg end fraction

No. space of space moles space equals fraction numerator Mass space over denominator Molar space mass end fraction
space space space space space space space space space space space space space space space space space space space space space space space space equals 92 over 23
space space space space space space space space space space space space space space space space space space space space space space space space equals space 4 space moles

space space space space space space space space Molarity space space equals space 4 over 1
space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 4 space straight m

Answered by Varsha | 29th Nov, 2017, 11:27: AM