This question is about the elements in Group 1 of the Periodic Table and their reactions with water.
State why sodium and potassium are in Group 1 of the Periodic Table.
A reaction occurs when a small piece of sodium is added to a large volume of water in a trough.
i) Give two observations that you would make during this reaction.
(2)
ii) After the reaction has finished, a few drops of universal indicator are added to the solution in the trough. Explain the final colour of the universal indicator.
(2)
iii) What is the most likely pH value of the solution in the trough after the reaction is complete?
A | 2 |
B | 5 |
C | 8 |
D | 12 |
(1)
Give the name of a Group 1 metal that is less reactive than sodium.
A small piece of potassium is added to a large volume of water in a trough. Give one observation that is made when potassium is added to water that is not made when sodium is added to water.
Complete the equation for the reaction of rubidium with water. State symbols are not required.
........Rb + ........H2O → ........RbOH + .........H2
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