Lab Activity: Acid-Base Titration

$20 \mathrm{mL}$ of calcium hydroxide was consumed when it was reacted with $10 \mathrm{mL}$ of unknown solution of ${\mathrm{H}}_2{\mathrm{SO}}_4.$ Also $20 \mathrm{mL}$ standard solution of $0.5 \mathrm{M} \mathrm{HCl}$ containing $2$ drops of phenolphthalein was titrated with calcium hydroxide, the mixture showed pink colour when burette displayed the value of $35.5 \mathrm{mL}$ whereas the burette showed $25.5 \mathrm{mL}$ initially. The concentration of ${\mathrm{H}}_2{\mathrm{SO}}_4$ is $\mathrm{\_\_\_\_\_\_\_M}.$ (Nearest integer)

Given below are two statements:
Statement-I : Methyl orange is a weak acid.
Statement-II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form.
In the light of the above statement, choose the most appropriate answer from the options given below:

0.05M CuSO₄ when treated with 0.01M K₂Cr₂O₇
gives green colour solution of Cu₂Cr₂O₇. The
[SPM : Semi Permeable Membrane]

     SideX         SPM          SideY

Identify the incorrect statements regarding
primary standard of titrimetric analysis

(A) It should be purely available in dry form.
(B) It should not undergo chemical change in air.
(C) It should be hygroscopic and should react
with another chemical instantaneously and
stoichiometrically.

(D) It should be readily soluble in water.
(E) KMnO4 & NaOH can be used as primary standard.

Choose the correct answer from the options given
below :

Given below are two statements :
Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.
Statement (II) : In this titration phenolphthalein can be used as indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:

Statement I: Potassium hydrogen phthalate is primary standard for $\mathrm{NaOH}$

Statement II : Phenolphthalein is used to detect completion of this titration.

What type of reaction occurs between ferrous sulfate and ammonium sulfate in the initial steps of Mohr's Salt preparation?

How should sodium hydroxide solution be added during titration?

How is the meniscus of the solution observed when noting the initial reading?

What information does M₂ provide in the titration formula?

If a small amount of base is added after the end point in the titration, what happens to the solution?

What happens to the pH near the end point in the titration of a strong acid with a strong base?

What is the purpose of removing the air gap from the burette before titrating the solution?

What does the term "basicity" refer to in the context of the titration equation?

What is the primary aim of standardisation in acid-base titrations?

What is the typical colour change for phenolphthalein during an acid-base titration?

What is the purpose of the indicator used in acid-base titrations?