Complete the general word equation for the reaction of a metal carbonate and an acid:
acid+metal carbonate→salt+water+…………… \text{acid} + \text{metal carbonate} \rightarrow \text{salt} + \text{water} + \dots\dots\dots\dots\dots acid+metal carbonate→salt+water+……………A student reacts calcium carbonate with dilute nitric acid.
What is the chemical name of the salt made in this reaction?
The student records the mass on a balance every 2 minutes to monitor how much gas escapes. The results are shown in the table below:
| Time (minutes) | Mass (g) |
|---|---|
| 0 | 182.4 |
| 2 | 178.6 |
| 4 | 176.1 |
| 6 | 174.5 |
| 8 | 173.8 |
| 10 | 173.8 |
How much carbon dioxide gas is made after 6 minutes?
The student wishes to obtain a pure, dry sample of the soluble salt and repeats the experiment 4 times to measure the final yield of crystals. The results are shown below:
| Experiment number | Mass of salt (g) |
|---|---|
| 1 | 12.45 |
| 2 | 11.90 |
| 3 | 12.18 |
| 4 | 12.63 |
Calculate the mean mass of salt produced. Give your answer to 3 significant figures.