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This is one of our many quizzes on Acid-base neutralization. Click on this to access more such competitive quizzes on General Chemistry.

Acid-base neutralization Quiz 2

chemistry

When wasp stings, we apply vinegar to cure the affected area. Why is it so?

  The wasp sting is alkaline in nature, when vinegar is applied the vinegar neutralizes the alkaline solution injected into the body. Since vinegar is an acidic substance and neutralization reaction takes place and gives relief.

 In the agricultural fields excess amounts of agrochemicals are used which increases the acidity of the soil. Which compound should be added to maintain the pH of the soil?

  The pH value is less when the soil is acidic.

 The soil will have a low pH value due to high acidic content, to neutralize the soil and make the soil neutral or basic to do agriculture. We have to add basic oxide to the soil to increase the pH of the soil. CaO is a basic oxide and it will be dissolved in water and forms calcium hydroxide which is basic in nature.

  Anirudh carried out a titration reaction with HCl and a reagent X. The indicator used was methyl orange. At the endpoint, the color change observed was golden yellow to golden red. The nature of X will be?

 Acid and base react to form salt and water and this salt solution will give the final pH and this pH gives the color change observed.

 The compound will be a weak base. Since the color change is golden yellow to golden red, the methyl orange gives such a color change only when the solution becomes less acidic. Here the strong acid reacts with a weak base like $N{{a}_{2}}C{{O}_{3}}$  and forms $NaCl$, water, and carbon dioxide as the product. The pH of the solution will increase.

  Akruthi carried out a titration reaction with 22ml of 0.08N HCl, with 0.05N NaOH. At what volume of NaOH will the endpoint be observed?

 The calculation is done using the formulae: ${{V}_{base}}=\dfrac{{{N}_{acid}}\times {{V}_{acid}}}{{{N}_{base}}}$

 Here the reaction involved is acid-base neutralization reaction and the calculation is as follows, $ \\ {{V}_{NaOH}}=\dfrac{{{N}_{HCl}}\times {{V}_{HCl}}}{{{N}_{NaOH}}}\\ {{V}_{NaOH}}=\dfrac{0.08\times 22}{0.05}=35.2ml$

  The titration curve given below is associated with which type of acid-base titration: $ \\ $<img  src="https://cmds-vedantu.s3.ap-southeast-1.amazonaws.com/prod/question-sets/f52f5bce-afca-4459-8b9b-b375fdb38a868411131797396915087.png"/>

 In the titration curve given, they have a sharp equivalence point.

The given titration curve corresponds to the titration between a strong acid and a strong base. The reaction is a neutralization reaction. Titration reaction between a strong acid and strong base will have a sharp equivalent point as given in the figure.