Which of the following has the highest molarity ? (i) 4 g of NaOH per 100 cm^3 of water (ii) 4 g of HCI per 100 cm^3 of water (iii) 4 g of H_2SO_4 per 100 cm^3 water

Which of the following has the highest molarity ? (i) 4 g of NaOH per

1.	Which of the following has the highest molarity ? (i) 4 g of NaOH per 100 cm^3 of water (ii) 4 g of HCI per 100 cm^3 of water (iii) 4 g of H_2SO_4 per 100 cm^3 water
Answer» Solution :`therefore` MOLARITY of a solution is GIVEN by: `w=(MM.V)/1000` (w = weight of solute in grams, M. = gram molecular MASS, V = VOLUME of solution in cm ). `therefore` The molarity of NaOH solution is given by `4=(M xx 39.998 xx 100)/1000` or M=1.000 Similarly for HCI solution, `4=(M xx 36.458 xx 100)/1000` or `M=1.0971` and for `H_(2)SO_(4)` solution, `4=(M xx 98.076 xx 100)/1000` or M = 0.40785 Hence, the HCI solution has the highest molarity.