Question
How would you prepare :
Calcium sulphate from calcium carbonate
Calcium sulphate from calcium carbonate
✓
Answer
Dissolving $CaCO_3$ in sulphuric acid $(H_2SO_4)$ solution, you'll get $CaSO_4$ salt
$CaCO_3 (s) + H_2SO_4 (aq) → CaSO_4 (s) + CO_2 (g) + H_2O (l)$
Calcium is a very strong reducing agent, its reduction potential is $2.87 V$. Reduction potential of Hydrogen is $0 V$
So calcium will displace hydrogen ions from suplhuric acid.
$CaCO_3 (s) + H_2SO_4 (aq) → CaSO_4 (s) + CO_2 (g) + H_2O (l)$
Calcium is a very strong reducing agent, its reduction potential is $2.87 V$. Reduction potential of Hydrogen is $0 V$
So calcium will displace hydrogen ions from suplhuric acid.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
(a) Why do the halogen atoms have a very strong electron affinity? Explain.
(b) Arrange Br, F, I and Cl in the order of increasing electron affinity.
(b) Arrange Br, F, I and Cl in the order of increasing electron affinity.
A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution :
| S.NO. | Substance added | Gas evolved | Odour |
| 1 | Calcium carbonate | _________ | _________ |
| 2 | Magnesium ribbon | _________ | _________ |
| 3 | Manganese (IV) oxide with heating | _________ | _________ |
| 4 | Sodium sulphide | _________ | _________ |
Three different electrolytic cells A, B and C are connected in separate circuits. Electrolytic cell A contains sodium chloride solution. When the circuit is completed a bulb in the circuit glows brightly. Electrolytic cell B contains acetic acid solution and in this case the bulb in the circuit glows dimly. The electrolytic cell C contains sugar solution and the bulb does not glow. Give a reason for each of these observations.
Calculate the percentage of platinum in ammonium chloroplatinate $(NH_4)_2PtCl_6.$
$[N = 14, H = 1, Pt = 195, Cl =35.5]$
$($Give your answer correct to the nearest whole number$)$
→$[N = 14, H = 1, Pt = 195, Cl =35.5]$
$($Give your answer correct to the nearest whole number$)$
Describe an experiment to prove the following:
HCI gas is heavier than air.
HCI gas is heavier than air.
Metal X is found in nature as its sulphides XS. It is used in the galvanization of iron articles. Identify the metal X. How will you convert this sulphide ore into the metal? Explain with equations.
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution.Describe the effect of Adding ammonium hydroxide to each portion in turn till it is in excess.
What do you observe when Ammonium solution is added to ferric chloride solution.
An aqueous solution of ammonia is prepared by dissolving ammonia in water. The rate of dissolution of ammonia to water is very high.
Diagram:
Diagram:
Define the following terms giving one example in each case (i) An acid (ii) A base (iii) An acid salt.