This question is about rate of reaction.
A student investigated the rate of the reaction between calcium carbonate 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}(\text{aq}) \rightarrow \text{CaCl}_2(\text{aq}) + \text{H}_2\text{O}(\text{l}) + \text{CO}_2(\text{g}) CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g)Which state symbol in the equation for the reaction does not represent one of the three states of matter?
The student determined the rate of production of carbon dioxide gas over time. What two pieces of measuring apparatus could the student use to carry out this determination by measuring the volume of gas?
The table below shows the volume of carbon dioxide gas collected during the investigation:
| Time (sss) | Volume of CO2\text{CO}_2CO2 produced (cm3\text{cm}^3cm3) |
|---|---|
| 0 | 0 |
| 10 | 22 |
| 20 | 38 |
| 30 | 48 |
| 40 | 54 |
| 50 | 57 |
| 60 | 58 |
| 70 | 58 |
Calculate the average rate of gas production between 10 s and 30 s.
Give three conclusions that can be drawn about the rate of this reaction as time increases, using the data in the table.
The student repeated the investigation using dilute hydrochloric acid at a higher temperature, keeping all other variables the same. Select the two correct statements from the options below: