How could you prove that sodium hydroxide is a base without using litmus papes to test? Give an equation for the reaction
If it isn't too concentrated, rub it between your fingers. Bases have a "slick" feeling. Too concentrated and it may burn your fingers.
2Na+ Cl = 2NaCl
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To prove that sodium hydroxide (NaOH) is a base without using litmus paper, you can utilize an acid-base reaction known as neutralization with an acid. Here's how you can proceed:
1. Gather the necessary materials: NaOH pellets or solution, distilled water, and an acid (e.g., hydrochloric acid, sulfuric acid).
2. Prepare a dilute solution of sodium hydroxide by dissolving a small amount of NaOH pellets in distilled water. Stir the solution until the pellets completely dissolve.
3. Take an aliquot of the prepared NaOH solution (a small measured volume) in a test tube.
4. Now, add a few drops of the acid (such as hydrochloric acid) to the NaOH solution in the test tube.
5. Observe the reaction between the NaOH and acid. Specifically, look for the signs of a neutralization reaction, which include heat generation (exothermic reaction), gas formation (bubbles), or pH change.
6. Equations for the reaction between NaOH and different acids:
- With hydrochloric acid (HCl):
NaOH + HCl → NaCl + H2O
- With sulfuric acid (H2SO4):
2NaOH + H2SO4 → Na2SO4 + 2H2O
These equations illustrate the formation of water (H2O) and a salt (NaCl or Na2SO4) as a result of the reaction between sodium hydroxide and the acid. This confirms that sodium hydroxide is a base, as it reacts with acids to produce water and a salt.