Calculate the mass of sodium sulphate required to prepare its 20 persent (mass percent) solution in 100g of water?

Solution: From formula Mass % of an element = Molar mass of component/Molar mass of compound ×100 The molecular formula of compound (Na2SO4) is  = [(2 × 22.99) + (32.06) + 4 (16.00)] =...

Answer: Given that 0.375 Molar aqueous solution Molar represent molarity of the solution Hence given molarity of solution will 0.375M Formula of molarity Molarity (M) = No. of moles of solute / volume of solution in...

Iron nails become reddish brown in colour and solution becomes green in colour.

(b) and (d) are colloids and will show Tyndall Effect.

‘C’ has made the desired solution  Mass by volume % = Mass of solute / Volume of solution×100    = 50 / 100×100    = 50 % mass by volume

(a) No.  Mass % = Mass of solute  Mass of solute + Mass of solvent ×100 (b) Solution made by Ramesh  Mass % = 10/ 100 +10 x 100 = 10 /110 x100 =...

The correct answer is (D) white

(C) barium sulphate and it is white in colour

When barium chloride solution and sodium sulphate solution are mixed together, an insoluble salt is formed, which is barium sulphate, and white in colour. BaCl2(aq) + Na2SO4(aq) → BaSO4(s) ↓ +...

(d) Dhreeu’s monthly salary = 6,00,000 /12 = Rs.50,000 Surya’s monthly salary = 50,000 x 40 /100 = Rs.20,000 Pranab’s monthly salary = 20,000 x 80 /25 =Rs.64,000