When calcium sulfate (CaSO₄) is added to sodium hydroxide (NaOH), a reaction occurs that can lead to the formation of calcium hydroxide (Ca(OH)₂) and sodium sulfate (Na₂SO₄), depending on the concentrations and conditions. The equation for this reaction can be represented as:
[ \text{CaSO}_4 + 2 \text{NaOH} \rightarrow \text{Ca(OH)}_2 + \text{Na}_2\text{SO}_4. ]
Calcium hydroxide is only slightly soluble in water, so it may precipitate out of the solution. This reaction is commonly observed in various chemical processes, including water treatment and construction.
You would need to add Sulphuric acid to make Sodium Sulphate + Water :)
sodium carbonate + copper sulfate ===> copper carbonate (s) + sodium sulfateNa2CO3(aq) + CuSO4(aq) ===> CuCO3(s) + Na2SO4(aq)
Mix dilute hydrochloric acid with calcium carbonate to obtain a calcium chloride solution; then add sodium sulphate solution to the calcium chloride solution to obtain calcium sulphate precipitate.
Oleic acid can be saponified by reacting it with a strong base, such as sodium hydroxide or potassium hydroxide, in a process called saponification. This reaction results in the formation of the corresponding soap, which is the sodium or potassium salt of oleic acid, along with glycerol as a byproduct.
Add sodium hydroxide solution; aluminium hydroxide will dissolve but Mg(OH)2 remain.
When copper sulfate is added to sodium hydroxide, a blue precipitate of copper hydroxide is formed. The color change observed is from the initial blue color of copper sulfate to the blue precipitate of copper hydroxide.
If you add copper sulfate to sodium hydroxide, a double displacement reaction will occur. The copper sulfate will react with the sodium hydroxide to form copper hydroxide, which is a blue solid, and sodium sulfate, which is a soluble compound. This reaction is often used in qualitative analysis to test for the presence of copper ions.
You would need to add Sulphuric acid to make Sodium Sulphate + Water :)
A brown precipitate of iron(III) hydroxide will form, along with the sodium sulfate remaining in solution. The iron(III) hydroxide precipitate will settle at the bottom of the container.
sodium carbonate + copper sulfate ===> copper carbonate (s) + sodium sulfateNa2CO3(aq) + CuSO4(aq) ===> CuCO3(s) + Na2SO4(aq)
CaCO3(s)+2NaOH(aq)--->Ca(OH)2(aq)+Na2CO3(aq) When you heat it later, the water in the solution evaporates leaving you with just the salts. Also, it is better to say, calcium carbonate is added to sodium hydroxide solution as you add a solid to a solution not really vice versa.
Mix dilute hydrochloric acid with calcium carbonate to obtain a calcium chloride solution; then add sodium sulphate solution to the calcium chloride solution to obtain calcium sulphate precipitate.
1) Add 2cm3 of solution to be tested to a test-tube. 2) Add an equal volume of 5% potassium hydroxide* solution and mix. 3) Add 2 drops of 1% copper sulphate solution and mix. A mauve or purple colour develops if protein is present. *Sodium hydroxide solution can be used instead of potassium hydroxide solution.
Adding iodine to sodium hydroxide will result in brown color due to the formation of sodium iodide and sodium hypoiodite.
Acid
It's an exothermic reaction that produces calcium hydroxide.
It is not recommended to add sodium bicarbonate (baking soda) to sodium hydroxide as it can cause a reaction that releases carbon dioxide gas. This reaction can be exothermic and may cause splattering of the solution. It is safer to add these chemicals separately to your desired solution.