Sodium Chloride and Solution Essay

2920 Words Aug 2nd, 2013 12 Pages
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Essay Sample: Page 2
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(c) The student obtained the following results. mass of basin and salt (step E) = 81.50 g mass of empty basin (step A) = 78.60 g



Calculate the mass of salt dissolved in 100 cm3 of sea water. (1)



Mass of salt = .................................... . . . . . . . . . . . . . . . . g (Total for Question 1 = 9 marks)



*P40134A0528*



5



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2 The diagrams show the reactions of some metals with cold water and with dilute hydrochloric acid. bubbles of gas



Metals in cold water calcium copper iron magnesium zinc



Metals in dilute hydrochloric acid calcium copper iron magnesium zinc



(a) Answer the following questions, using only the metals that appear in the diagrams. (i) Name two metals that react with cold water. (2)

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and ............................................................................................................... . . . . . . . . . . . . . . . . . . . . .



(ii) Name one metal that reacts with dilute hydrochloric acid but not with cold water. (1)

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