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Hydrogen gas is evolved by reacting a piece of magnesium ribbon with water. (a) Describe how you could show that the gas collected is hydrogen. (b) Write a symbol equation for the reaction taking place between magnesium and water. (c) Suggest how the appearance of magnesium would change after a week. (d) A few drops of universal indicator solution were added to water in the beaker. What colour would you expect to see and what pH would this colour indicate?

a) Burns with pop sound.
b) Mg + H2O = Mg(OH)2 + H2
c) Turn black then white.
d) Green and Neutral.
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a.when u bring a candle near  it it burns with a pop sound
b.mg +h2o=mg(oh)2+ h2
c. it would turn black and the to white
d.the ph colour would be green and it is neutral
 
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Hi

Hope the above answers solve u r query

Regards
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a)burning match stick and produce pop
b) Mg + H O = Mg(OH) + H  c) Turn black then white. d) Green and Neutral. 
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can you please explain the last two subunits (c and d) why black first then white? and also why would it remain neutral when Mg(OH)2 is formed?
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a) Burns with pop sound.
b) Mg + H2O = Mg(OH)2 + H2
c) Turn black then white.
d) Green and Neutral.
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