1
Q
State the observation that is made when platinum is added to cold water?
A
No change
2
Q
Describe a test to show that the bubbles contain hydrogen gas?
A
Splint with squeaky pop
3
Q
Word equation for magnesium and dilute hydrochloric acid?
A
Magnesium + dilute hydrochloric acid –> magnesium chloride + hydrogen.
4
Q
What are the two observations that would be made as the reaction occurs?
A
- A brown solid is formed
- Solution turns colourless
5
Q
Explain why this is a redox reaction
- Zn + Cu2+ –> Zn2+ + Cu
A
Zinc has lost electrons
Copper ion has gained electrons
Zinc has been oxidised and copper has been reduced.
GCSE Chemistry
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