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Wednesday, 25 September 2013

Pattern of Reactivity Quiz

REACTIVITY SERIES - Chem is try  2
Workout these questions with your learning partner. There are 40 marks possibly.


1)      Answer the following questions in full sentences.
a)     Why does gold occur native (uncombined) whereas zinc does not?
………………………………………………………………………………………………
b)     Why was silver used to make coins in the past?
………………………………………………………………………………………………
c)      Why is copper used to make electrical cables and wires?
………………………………………………………………………………………………
 (3)
  2)      The following metals are listed in order of reactivity (most reactive first)
sodium  >  magnesium  >  zinc  >  copper
a)     Describe what each metal does when
(i)    heated in air  …………………………………………………………..
(ii)  added to dilute hydrochloric acid……………………………………..
b)     Which of the four metals would be suitable for making saucepans?  Explain why the others are not.
………………………………………………………………………………………………
………………………………………………………………………………………………
(5)

3)     Describe what you would see if you dropped a piece of magnesium ribbon into some copper sulphate solution in a test tube.  Write a word equation for the reaction.
………………………………………………………………………………………………
……………………………………………………………………………………………...
………………………………………………………………………………………………
………………………………………………………………………………………………
(3)

4)     Complete the following word equations.
a)     zinc   +   lead nitrate solution  ………………………………………………………….
b)     iron   +   zinc sulphate solution  ………………………………………………………..
c)      lead   +   copper nitrate solution ………………………………………………………
d)     magnesium   +   zinc chloride solution  ………………………………………………..
e)     copper   +   sodium chloride solution  …………………………………………………
f)       zinc   +   iron sulphate solution  ………………………………………………………..
g)     gold   +   silver nitrate solution  ………………………………………………………..
h)     magnesium   +  calcium nitrate solution  ……………………………………………..
(8)
5)     Three metals X, Y and Z have the following reactions:-
Y will displace X from a solution of its salt.
Z will displace both X and Y from solutions of their salts.
Place the three metals in order of reactivity, starting with the least reactive.
………………………………………………………………………………………………
(2)

6)     Here is a list of metals in order of decreasing reactivity.  Q and R are mystery metals.
K > Q > Ca > Mg > Al > Zn > R > Fe > Cu
a)     Will Q react with cold water?                                                              …………
b)     Will R react with cold water?                                                                              …………
c)      Will R react with dilute hydrochloric acid?                                 ...……….
d)     Will R displace copper from copper sulphate solution?    ...……….
e)     Write word equations for any reactions in parts a) to d)
………………………………………………………………………………………………….
………………………………………………………………………………………………….
………………………………………………………………………………………………….
………………………………………………………………………………………………….
(6)
7)     Describe everything you see when sodium is added to water containing universal indicator.

Name the two chemical products of sodium reacting with water and give the symbol equation for the reaction of sodium with water.
(3)
8)     (a) Give two observations that could be made after adding zinc to copper(II) sulphate solution.

(b) Give the symbol equation for the reaction between zinc and copper(II) sulphate solution.

(4)
(c) explain why this is an example of a displacement reaction.

  9   (a) Give three observations that could be made when magnesium reacts with sulphuric acid.
     (b) Give the word and symbol equation for zinc reacting with sulphuric acid.
     (c) From copper, iron, magnesium and zinc: Which reacts with acid (i) fastest?, (ii)slowest?
(6)


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