40 g NaOH in 100 g of water
40 g NaOH in 1000 g of water
20 g NaOH in 500 of solution
20 g NaOH in 1000 g of solution
2o g NaOH in 80 g of solution
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The best option is A. Solubility is the number of grammes needed to saturate 100g of water. Even though, here molarity should be calculated using the total volume of solution in dm³
solubility can be expressed as the number of grammes of the solute needed to saturate 100g of the solvent at that temperature or number of grammes of the solute present in 1dm3 not (1000g) of the saturated solution .
NAOH contains 40g which will dissolve in 100g of water or present in 1dm3 of saturated soln
A molar solution implies concentration in terms of moles/liter.The respective atomic weights for NaOH are: Na - 23,0 - 16 and H - 1, so the molecular weight, is 23 + 16 + I = 40. Thus 40 grams of NaOH equals one mole of NaOH, and a 1 molar solution of NaOH will contain 40 grams of NaOH chemical in 1000grams of water.
