A student investigates the reaction between calcium carbonate, CaCO3\text{CaCO}_3CaCO3, and hydrochloric acid, HCl\text{HCl}HCl.
Calcium chloride, water, and carbon dioxide are produced.
Complete the balanced symbol equation for the reaction.
CaCO3(s)+2HCl(aq)→……………(aq)+H2O(l)+CO2(g)\text{CaCO}_3(\text{s}) + 2\text{HCl}(\text{aq}) \rightarrow \dots\dots\dots\dots\dots (\text{aq}) + \text{H}_2\text{O}(\text{l}) + \text{CO}_2(\text{g})CaCO3(s)+2HCl(aq)→……………(aq)+H2O(l)+CO2(g)
Hydrochloric acid has the state symbol (aq)\text{(aq)}(aq).
What does (aq)\text{(aq)}(aq) mean?
Name a common piece of laboratory apparatus that can be connected to the reaction flask to collect and measure the volume of carbon dioxide gas produced.
The table below shows the student's results during the reaction:
| Time (minutes) | Volume of gas collected (cm3\text{cm}^3cm3) |
|---|---|
| 0 | 0.0 |
| 1 | 8.0 |
| 2 | 14.0 |
| 3 | 18.0 |
| 4 | 21.0 |
| 5 | 23.0 |
| 6 | 24.0 |
| 7 | 24.0 |
| 8 | 24.0 |
At what time was the reaction complete?
By drawing a smooth curve of best fit through these data points, estimate the volume of gas collected at 3.5 minutes3.5\text{ minutes}3.5 minutes.
The student wishes to collect a larger volume of gas. Assuming the calcium carbonate solid is in excess, which of the following changes to the experiment should the student make?