You are going to investigate the temperature change when magnesium reacts with dilute sulfuric acid. Read all of the instructions carefully before starting the experiments. Instructions You are going to do five experiments. Explain why the results of the experiment are more accurate if the boiling tube is wrapped in cotton wool. ......................................................................................................................................... . ......................................................................................................................................... . ................................................................................................................................... (ii) Explain why a $$$25.0 \mathrm{~cm}^{3}$$$ volumetric pipette cannot be used to accurately measure the volume of the distilled water added. ......................................................................................................................................... . ................................................................................................................................... (iii) State one other way in which the apparatus can be changed to give more accurate results. ......................................................................................................................................... . ......................................................................................................................................... . ...................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_51 Year：2024 Question No：1(f)

Answer:

3.3.4. Use the molar gas volume, taken as 24 dm3 at room temperature and pressure, r.t.p., in calculations involving gases

5.1.1. State that an exothermic reaction transfers thermal energy to the surroundings leading to an increase in the temperature of the surroundings