A piece of magnesium ribbon is added to a flask containing dilute hydrochloric acid.
Hydrogen gas is formed which is collected in the measuring cylinder.
The line on the graph indicates the rate of chemical reaction occurring in the flask.
The amount of hydrogen formed with time is plotted on a graph.

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The reaction is repeated with magnesium powder in place of magnesium ribbon under the same conditions. Will the reaction rate increase or decrease?

Explain your answer with reference to the volume of hydrogen formed in the flask at 2 minutes.

A piece of magnesium ribbon is added to a flask containing dilute hydrochloric acid.
Hydrogen gas is formed which is collected in the measuring cylinder.
The line on the graph indicates the rate of chemical reaction occurring in the flask.
The amount of hydrogen formed with time is plotted on a graph.

.

Which of these could increase the rate of reaction in the flask?

Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas.

Write a balanced chemical equation to show the reaction.

Which of the following is an example of simple displacement reaction?

Given below is the balanced chemical equation for the thermal decomposition of lead nitrate.

$2\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\to 2\mathrm{PbO}+4{\mathrm{NO}}_2+{\mathrm{O}}_2$

Which of the following information does the coefficients of $\mathrm{PbO}$ and ${\mathrm{NO}}_2$ in the equation ($2$ and $4$ respectively) tell us?

The diagram below shows the set-up in which the electrolysis of water takes place.

What type of reaction takes place?