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?
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a) Test for H2 gas: Introduce a burning splinter near the mouth of the test tube. Hydrogen burns with a pop sound
b) Mg + H2O = Mg(OH) + H2
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