Sodium Chloride and Solution Essay

2920 Words Nov 15th, 2013 12 Pages
Write your name here
Surname Other names

Edexcel Certificate Edexcel International GCSE

Centre Number

Candidate Number

Chemistry
Unit: KCH0/4CH0 Science (Double Award) KSC0/4SC0 Paper: 1C
Monday 21 May 2012 – Morning Time: 2 hours
You must have: Calculator
Paper Reference

KCH0/1C 4CH0/1C KSC0/1C 4SC0/1C
Total Marks

Instructions
Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions. Answer the questions in the spaces provided – there may be more space than you need. Show all the steps in any calculations and state the units.

Information
The total mark for this paper is 120. The marks for each question are shown in
…show more content…
. . . . . . . . . . . . . . . . . . . . . .

(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

Turn over

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)
. . . . . . . . . . . . .................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........... ....

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

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

Related Documents