Table of Contents
- 1 What happens when HCl is added to sodium carbonate?
- 2 In which apparatus standard solution is taken during the titration of sodium carbonate with HCl?
- 3 Is the reaction between hydrochloric acid and sodium carbonate exothermic or endothermic?
- 4 Why is sodium hydroxide unsuitable as a primary standard?
- 5 Is used for standardization of HCl in neutralization titration?
- 6 What is the indicator used in the titration of sodium carbonate against hydrochloric acid which solution is taken in the burette and what is the end point?
What happens when HCl is added to sodium carbonate?
Answer: When dilute hydrochloric acid reacts with sodium carbonate, then sodium chloride, carbon dioxide and water are formed. A brisk effervescence is seen in the release of carbon dioxide.
Why can HCl be used as a primary standard?
HCl is not a solid at room temperature and pressure. HCl cannot be obtained at a very high purity. HCl does not have a high molecular mass.
In which apparatus standard solution is taken during the titration of sodium carbonate with HCl?
Burette
Burette is a glass apparatus used for titration.
Why two equivalence point are possible for the titration of sodium carbonate with hydrochloric acid?
There are two equivalence points because sodium carbonate is polyprotic (diprotic): The pH at the equivalence point (second) is acidic because at the equivalence point, the solution contains a salt of the weak base. Note that there is an equilibrium also, the dissociation of . The result is an acidic solution.
Is the reaction between hydrochloric acid and sodium carbonate exothermic or endothermic?
The reaction is exothermic.
Is Hydrochloric acid is a primary standard?
HCl cannot be considered to be a primary standard because of its gaseous form at room temperature, but its solutions may be standardized against anhydrous Na2CO3. 4-5. Explain how to prepare 250.00 mL of 0.0100 N Na2B4O710H2O solution.
Why is sodium hydroxide unsuitable as a primary standard?
NaOH has no criteria given above. It is not suitable for the primary standards because they absorb the moisture from the atmosphere. It also absorbs carbon dioxide from the atmosphere. Hence, NaOH is not a primary standard because it has no quality of primary standard.
How do you prepare a HCl solution for a titration?
Hydrochloric acid Solution Preparation Take about 100 ml of water in a cleaned and dried 1000 ml volumetric flask. Add about 8.5 ml of Conc. Hydrochloric acid with continuous stirring. Add more about 700 ml of water, mix and allow to cool to room temperature.
Is used for standardization of HCl in neutralization titration?
The indicator used in this experiment is phenolphthalein. Phenolphthalein, an organic compound, is colorless in acidic solution and pink in basic solution. In the second procedure the standardized NaOH will be used to determine the molarity of a hydrochloric solution (HCl).
What happens at the end point in the titration of sodium carbonate with HCl If methyl orange indicator is used?
Theory. The hydrochloric acid solution can be titrated using a methyl orange indicator against the sodium carbonate solution. If a slightly acidic solution is titrated with a weak base, the endpoint is slightly acidic.
What is the indicator used in the titration of sodium carbonate against hydrochloric acid which solution is taken in the burette and what is the end point?
Answer: In this case, hydrochloric acid is taken in the burette and sodium carbonate solution in the conical flask. Methyl orange is used as an indicator. The colour change at the end point will be from yellow to pinkish-red.