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(a) Name one raw material from which sodium hydroxide is manufactured.
(b) Sodium hydroxide pellets were accidentally mixed with sodium chloride. 17.6g of the mixture were dissolved in water to make one litre of solution. 100#cm^3# of the solution was neutralized by 40#cm^3# of 1.5M sulphuric (VI) acid.
(i) Write an equation for the reaction that took place.
(ii) Calculate the:
(I) Number of moles of the substance that reacted with sulphuric (VI) acid.
(II) Number of moles of the substances that would react with sulphuric (VI) acid in the one litre of solution.
(III) Mass of the unreacted substances in one litre of solution.
(H=1.0; Na=23.0; Cl=35.5; 0=16.0).
(c) The diagram below shows an incomplete set-up used to prepare and collect ammonia gas.
(i) Name solid M.
(ii) Complete the diagram to show how a dry sample of ammonia gas can be collected.