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Solubility of Salts

Chemistry Tuition classes in Miracle Learning Centre is very useful. If you do not understand chemistry, you must definitely attend the chemistry tuition class at Miracle Learning Centre. Let us learn about solubility of salts in this chemistry tuition lesson.

Your chemistry tuition teacher at Miracle Learning Centre will teach you about the solubility table. This table is very important as it will help you to solve many types of chemistry tuition questions with topics like separation techniques, preparation of salts and qualitative analysis.

All ammonium, sodium and potassium salts are soluble in water. All group I salts are soluble.
All sulfates are soluble except lead(II) sulfate, barium sulfate and calcium sulfate.
All chlorides are soluble except lead(II) chloride and silver chloride.
All carbonates are insoluble except ammonium carbonate, sodium carbonate and potassium carbonates.

All hydroxides are insoluble except sodium hydroxide, potassium hydroxide and aqueous ammonia.
Group II hydroxides are slightly soluble.
This table is extremely important and all chemistry tuitions students need to know it at their fingertips.

The student at Miracle Learning Centre asked, " How do you separate calcium carbonate from sodium chloride? " The chemistry tuition teacher at Miracle Learning Centre replied, "From the solubility table, calcium carbonate is insoluble while sodium chloride is soluble. Hence we dissolve the mixture in water, then carry out filtration. The residue is calcium carbonate and the filtrate is sodium chloride solution. In order to obtain crystals of sodium chloride, we will need to heat the solution to dryness."

Another student at Miracle Learning Centre asked, " In two separate reactions, calcium carbonate react with sulfuric acid and calcium carbonate react with hydrochloric acid. Why does the reaction with sulfuric acid produce less carbon dioxide? " The chemistry tuition teacher at Miracle Learning Centre replied, "This is because calcium sulfate which is an insoluble salt is formed. It forms an insoluble layer around calcium carbonate and acts as a barrier and hence it cannot react with sulfuric acid. On the other hand, calcium chloride formed is soluble and will not stop the reaction."
Miracle Learning Centre hope you have understood what the solubility table is about and how it helps you to answer chemistry tuition questions. Do come to Miracle Learning Centre for more chemistry tuition lessons to learn more about solubility and chemistry. To help students memorise the solubility table more easily, Miracle Learning Centre has compiled important chemistry and physics facts summarised in a formula card. Come and get a free copy from us.