Name::

2.1 The table gives some information about four elements.

a) From this list name:
i) the element which is a metal. . carbon hydrogen magnesium sulphur
ii) the non-metal which conducts electricity. . carbon hydrogen magnesium sulphur  

c) A piece of magnesium ribbon is added to some hydrochloric acid (HCl).

The magnesium reacts with the hydrochloric acid to produce a gas and a salt.

What is the name of: 
                                i) the gas?  
                                ii) the salt? 

d) Name the two substances which would be produced when zinc is reacted with some sulphuric acid.

Substance 1
Substance 2

2.2 The table gives some information about four chemicals.

a) i) Universal Indicator can be used to find out the pH of acids and alkalis.
       Suggest the pH value of hydrochloric acid.     pH value . 1 3 5 7 9 11

    ii) Which element is found in both acids?  . Hydrogen Helium Sodium Potassium Chlorine Sulphus

b) When 10cm³ of hydrochloric acid had been added 15cm³ of sodium hydroxide the Universal Indicator showed a pH value of 7.
Was the new solution acidic            
                                alkaline        
                                or neutral?    

iv) Complete the following word equation.

acid     +        alkali ----------->   +

2.3 The table shows what happens when four metals are added to hydrochloric acid.

a) State two ways you can tell that there is a reaction between magnesium and hydrochloric acid.

1
2

b) Arrange these four metals into a list that shows the order of their reactivity with hydrochloric acid.
   

c) An iron nail was put into a test tube containing a solution of copper

.

Very quickly the nail became coated with a reddy-brown deposit.  
i) What was this reddy-brown deposit?

d) Railway workers use a mixture of aluminium powder and iron oxide to help them weld broken iron rails together. The mixture is heated and the reaction produces molten iron. This molten iron is poured into the gaps between the broken ends of the rail. When it cools it fills the gap and joins the broken ends together.
Explain why iron is produced during the reaction.