A small quantity of hydrochloric acid and a large quantity of limestone chips (CaCO3) are reacted on a beaker, which was placed on the pan of a balance. The mass of the beaker and its contents were recorded every half minute.
(a) Write a chemical equation to show the reaction of the hydrochloric acid and the limestone chips.
(b) Explain why the curve shows down.
(c) What is the mass of the beaker and its contents at the start and end of the experiment?
(d) What is the mass of carbon dioxide at the 1st and 4th minutes?
(e) sketch curves to show the experiment at the lower temperature and the limestone powder.
CaCO3 + 2HCl ==> CaCl2 + H2O + CO2
You list no data; therefore, no calculations are possible showing loss CO2 or anything else. Please be advised, also, that we can't draw/sketch graphs on this forum.
Ok. Thanks.
(a) The chemical equation for the reaction of hydrochloric acid (HCl) with limestone chips (CaCO3) is as follows:
CaCO3 + 2HCl -> CaCl2 + CO2 + H2O
(b) The curve shows a decrease because as the hydrochloric acid reacts with the limestone chips, carbon dioxide gas (CO2) is released. The mass of the beaker and its contents decreases as the gas escapes into the atmosphere.
(c) The mass of the beaker and its contents at the start of the experiment can be determined from the recorded values. The mass at the end of the experiment will be the final recorded value.
(d) To determine the mass of carbon dioxide at the 1st and 4th minutes, you would need to check the recorded values for those time intervals. The difference in mass between two consecutive readings will give you the mass of the carbon dioxide released during that time.
(e) In order to sketch curves to show the experiment at a lower temperature and using limestone powder, we need more information about the specific conditions and measurements of the experiment. Additionally, the effect of temperature and the form of limestone used may result in different reaction rates and outcomes.