10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HC1. If we take 20 ml of the same solution of NaOH, the amount of HC1 solution (the same solution as before) required to neutralise it will be
(a) 4 mL
(b) 8 mL
(c) 12 mL
(d) 16 mL

AcademicChemistryNCERTClass 10

Correct answer: (d)16ml. 
Explanation: It is given that 10ml of a solution of NaOH is completely neutralized by 8ml of a solution of HCl. Then 20ml of the solution of NaOH which is double the amount taken before will require double the solution of HCl taken earlier, which is 16ml to be completely neutralized.

[Extra information: An acid is a molecule or substance that has a pH value of less than 7.0 when it is present in an aqueous solution. The term acid is derived from the Latin word acere which means sour.

Acids react with Bases to give Salt and Water. The Word Reaction is given as Acid + Base --> Salt + Water.

An acid is a molecule or ion capable of donating a proton, or, alternatively, capable of forming a covalent bond with an electron pair. It turns blue litmus paper to red. Acid is a substance that contains hydrogen ions (H+). It do not give colour with phenolphthalein indicator and do not absorb carbon dioxide gas. Also, acids do not react with ammonium salt.

Natural Acids are the acids that occur in nature, such as acids present in fruits. Acids are generally found in Vinegar, Curd, Spinach, lemons, Citrus fruits, Amla, Tamarind, grapes, unripe mangoes, Citrus fruits such as oranges, etc.]

raja
Updated on 10-Oct-2022 12:46:40

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