What is the molarity of 20% (w/v) H2SO4 solution?(a) 0.51 M(b) 1.02 M(c) 4.08 M(d) 2.04 MI had been asked this question by my college director while I was bunking the class.My query is from Expressing Concentration of Solutions topic in chapter Solutions of Chemistry – Class 12

What is the molarity of 20% (w/v) H2SO4 solution?(a) 0.51 M(b) 1.02 M(

1.	What is the molarity of 20% (w/v) H2SO4 solution?(a) 0.51 M(b) 1.02 M(c) 4.08 M(d) 2.04 MI had been asked this question by my college director while I was bunking the class.My query is from Expressing Concentration of Solutions topic in chapter Solutions of Chemistry – Class 12
Answer» Right option is (d) 2.04 M The BEST I can EXPLAIN: Given, 20% (w/v) means 20 g of H2SO4 is present in 100 mL (= 0.1L) of solution. Data – Moles of SOLUTE (H2SO4) = mass of solute/molar mass Moles of solute, n = 20 g/(2 x 1 + 32 + 4 x 16) g/mole = 0.204 mole Volume, V = 0.1 L Molarity, M = moles of solute (n)/volume of solution (V) M = 0.204 moles/0.1 L = 0.204 M.

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