You are given equal quantities of two liquids in beakers. You are told that one of them is a strong acid and the other is a weak acid. Both are in concentrated from. You are also given a basic solution and an indicator. How will you determine which beaker has the strong acid and which has the weak acid?

Open in App

Solution

Indicators have different colours in acids and bases. For eg., Methyl orange turns red in acidic solution and yellow in basic solution.
A weak acid produces a very few numbers of hydrogen ions as compared to strong acid. Due to the low availability of hydrogen ions, the reaction between the indicator and the weak acid does not occur properly, so colour change is weak and slow. But in case of a strong acid, the concentration of hydrogen ions is much higher, hence the indicator solution changes its colour quickly to strong red color.

Suggest Corrections

Similar questions

Q. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only tumeric indicator.

What is strong acid, weak acid, dilute acid and concentrated acid?

And why?

How strong acid are different from concentrated acid and how dilute acid is different from weak acid?

Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator.

Q. Two acids 'A' and 'B' were kept in beakers. Acid 'A' undergoes partial dissociation in water, whereas acid 'B' undergoes complete dissociation in water.
i) of the two acids 'A' and 'B'. Which is weak acid and which is strong acid ?
ii) Give one example for weak acid and strong acid.

Q. A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator turn if it is added to this beaker? Is it a strong or a weak acid?

Join BYJU'S Learning Program