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G7 CH8 - Chemical Reaction
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A gas was tested with a lighted splint and it made a popping sound. Which gas was it?
Hydrogen
Iron filings heated with sulfur to produce iron sulfate. Chemical reaction or Physical change?
Chemical Reaction
Sugar dissolving in a hot drink. Chemical reaction or Physical change?
Physical Change
When a piece of apple is placed in hydrogen peroxide it bubbles. A gas is given off. This gas is __________
Oxygen
When baking powder and vinegar react, a gas is also given off. This gas is __________
Carbon dioxide
the reaction of magnesium with acid and seen bubbles of the gas. What gas is produced?
Hydrogen
If the solution is green, what pH does it has?
pH 7
Is this fair test or not?
Not Fair test. (Because the acid is not same)
How many cm3 is this reading?
16 cm3
How many cm3 is this reading?
12 cm3
How many cm3 is this reading?
47 cm3
The products of a chemical reaction contain the elements magnesium, hydrogen and chlorine. What elements are present in the reactants?
Magnesium + Hydrogen + Chlorine
Complete these word equations
Magnesium and hydrogen
Complete these word equations
Hydrochloric and hydrogen


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