A student investigated the rate of the reaction between calcium carbonate chips and dilute hydrochloric acid.
The equation for the reaction is: CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g)\text{CaCO}_3\text{(s)} + 2\text{HCl(aq)} \rightarrow \text{CaCl}_2\text{(aq)} + \text{H}_2\text{O(l)} + \text{CO}_2\text{(g)}CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g)
Which state symbol in this equation does not represent one of the three states of matter?
What two pieces of measuring apparatus could the student use to find the rate of mass loss of the reaction mixture as the carbon dioxide gas escapes?
The table below shows the results of the investigation:
| Time in s\text{s}s | Mass of flask and contents in g\text{g}g |
|---|---|
| 0 | 200.00 |
| 20 | 197.60 |
| 40 | 195.90 |
| 60 | 194.80 |
| 80 | 194.10 |
| 100 | 193.70 |
| 120 | 193.50 |
| 140 | 193.50 |
Give three conclusions that can be drawn about the rate of reaction from this data.
The student repeated the investigation using the same mass of calcium carbonate, but as a fine powder rather than medium-sized chips. All other variables were kept the same. Which two of the following statements are correct?