CHEMISTRY

JAMB 2004 - Question 19

Chemistry 2004 JAMB Past Questions - Question 19: Calcium tetraoxosulphate (VI) dissolves in water only sparingly to form a

Choose the correct answers from the options given.
Calcium tetraoxosulphate (VI) dissolves in water only sparingly to form a
A:
B:
C:
D:
Examkits App

Examkit's JAMB CBT App

Practice JAMB offline with our Online, PC and Mobile App

  • ✅ 25+ years of past questions (2000 to 2025)
  • ✅ Video solutions and explanation to questions
  • ✅ E-library
  • ✅ Study by topic
  • ✅ And more.

Correct Answer

D

Explanation

Calcium tetraoxosulphate (VI) is more commonly known as calcium sulfate or gypsum. When calcium sulfate dissolves in water, it undergoes a sparingly soluble reaction, forming calcium ions (Ca²⁺) and sulfate ions (SO₄²⁻). The balanced chemical equation for the dissolution of calcium sulfate in water is:

\[ \text{CaSO}_4 \, (s) \rightleftharpoons \text{Ca}^{2+} \, (aq) + \text{SO}_4^{2-} \, (aq) \]

The double arrow indicates that the reaction is in equilibrium, and calcium sulfate is sparingly soluble in water, meaning only a small amount of it dissolves. This is why it is often described as "sparingly soluble" or "insoluble" in water.

The solubility of calcium sulfate can be influenced by factors such as temperature. For example, its solubility generally increases with higher temperatures.

Frequently Asked Questions

Examkits is a JAMB CBT practice platform that provides over 20 years of past questions, Post UTME questions, and detailed video solutions to help students prepare for their exams.

You can practice JAMB past questions online, on Android, or on a desktop using the Examkits app. Just register on our website and choose your preferred device.

Yes. Our Android and Windows versions support offline usage. Once downloaded and activated, no internet is required to use most of the features.

Yes, Examkits provides detailed video explanations for all JAMB past questions from 2000 to 2024, helping students understand how to solve each problem.

Examkits offers free practice for some subjects. However, full access requires a one-time affordable activation fee for each version of the app.