2.The ancient Egyptians place gold and silver objects into tombs.
a) Explain why people today opening the tombs thousands of years later come across the objects nonetheless in great situation.
Since gold and silver are almost at the bottom of the reactivity series which means they do not react with air. If they had been greater and had reacted with air they would have decomposed over the years.
b) Clarify why no iron objects are identified in the tombs.
Simply because iron is greater up than gold or silver on the reactivity series and does react with air
three.a) Which are attacked by acid rain more readily:
(i) Lead gutters or (ii) Iron drain pipes? Explain your answer fully.
Iron drainpipes due to the fact iron forms an oxide (rusts) with water and for the reason that it is greater up on the reactivity series than lead
b) Meals cans are made of iron coated with tin. How does this assistance them to resist attack by the acids in meals?
Tin isn’t pretty reactive, so it protects the iron behind it
five.The following metals are listed in order of decreasing reactivity. X and Y are two unknown metals.
K X Ca Mg Al Zn Y Fe Cu
a) Will X react with cold water?
Yes since it is larger than calcium which reacts with water
b) Will Y react with cold water?
No for the reason that it is beneath aluminium which doesn’t react with water
c) Will Y react with dilute hydrochloric acid? Clarify how you arrive at your answers.
Yes because it is above iron which reacts with dilute acid