Three liquids are given to you. One is
sulphuric acid, another is sodium hydroxide and
the third is a salt solution. How will you identify
them? You have only turmeric paper indicator.
Answers
Answer:
Explanation(a) An indicator is a dye that changes color when it is put into an acid or a base.
(b) Put one drop of each liquid on turmeric paper, turn by turn.
(i) The liquid which turns the yellow turmeric paper red will be sodium hydroxide (base). The red turmeric paper formed here can now be used to test sulphuric acid.
(ii) Put one drop each of the remaining two liquids on red turmeric paper. The liquid which makes the red turmeric paper yellow again will be sulphuric acid (This is because sulphuric acid cancels the effect of sodium hydroxide base on turmeric paper).
(iii) The liquid which has no effect on the red turned turmeric paper will be salt solution (because it is neutral):
Answer:
1) Sulfuric acid (American spelling) or sulphuric acid (British spelling), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H2SO4.
2) Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na⁺ and hydroxide anions
3) A balanced salt solution (BSS) is a solution made to a physiological pH and isotonic salt concentration. Solutions most commonly include sodium, potassium, calcium, magnesium, and chloride.
Sodium Hydroxide and Sulfuric Acid yields Sodium sulfate and Water.
Explanation: