Volumetric Analysis

Volumetric Analysis

By Angela Toh

Multiple Choice

The point in an acid-alkali titration at which the reactants just react completely with each other is called the __________ point.

• equivalence point

• end point

Multiple Choice

A chemical used to show the end point of titration is called

• base

• indicator

• pipette

• acid

Multiple Choice

The quantity of liquid delivered by the burette in a titration is called

• burette reading

• aliquot

• concentration

• titre

Multiple Choice

To prepare a solution of accurately known volume, use a

• measuring cylinder

• beaker

• concial flask

• volumetric flask

Multiple Choice

A standard solution is a solution with accurately known concentration.

• True

• False

Multiple Choice

What volume of water is required to dilute 120 cm³ of 10 mol dm^–3 sulfuric acid to a concentration of 2 mol dm^–3?

• 360 cm³

• 480 cm³

• 600 cm³

• 720 cm³

Multiple Choice

3.75 dm³ of distilled water are added to 250.0 cm³ of 3.20 mol dm^–3 sodium hydroxide solution. What is the molarity of the diluted solution?

• 0.200 mol dm^-3

• 0.213 mol dm^-3

• 2.00 mol dm^-3

• 2.13 mol dm^-3

Multiple Choice

What volume of 5.0 mol dm^–3 hydrochloric acid is required to prepare 250 cm³ of a 0.40 mol dm^–3 solution?

• 10 cm³

• 20 cm³

• 30 cm³

• 40 cm³

Fill in the Blanks

Beaker A contains 500 cm³ of 1.0 M of HCl. A student pipettes 25 cm³ of HCl

from beaker A and places it in Beaker B. The student then adds water to Beaker B such that the total volume of solution in Beaker B is 250 cm³. What is the final concentration (in terms of M) of HCl in Beaker B?

Multiple Choice

A 4 g sample of sodium hydroxide, NaOH, is dissolved in water and made up to 500

cm³ of aqueous solution. What is the concentration of the resulting solution?

• 0.1 mol dm^-3

• 0.2 mol dm^-3

• 0.5 mol dm^-3

• 1 mol dm^-3

Open Ended

27.82 g of hydrated sodium carbonate crystals, Na₂CO₃. xH₂O, was dissolved in water and made up to 1.000 dm³. 25.00 cm³ of this solution was neutralized by 48.80 cm³ of hydrochloric acid of concentration 0.1000 mol dm^-3.

(a) Write an equation for the reaction between sodium carbonate and hydrochloric

acid, including the state symbols.

Fill in the Blanks

27.82 g of hydrated sodium carbonate crystals, Na₂CO₃. xH₂O, was dissolved in water and made up to 1.000 dm³. 25.00 cm³ of this solution was neutralized by 48.80 cm³ of hydrochloric acid of concentration 0.1000 mol dm^-3.

(b) Calculate the molar concentration of the sodium carbonate solution neutralized

by the hydrochloric acid.

Fill in the Blanks

27.82 g of hydrated sodium carbonate crystals, Na₂CO₃. xH₂O, was dissolved in water and made up to 1.000 dm³. 25.00 cm³ of this solution was neutralized by 48.80 cm³ of hydrochloric acid of concentration 0.1000 mol dm^-3.

(c) Determine the mass of sodium carbonate neutralized by the hydrochloric acid

and hence the mass of sodium carbonate present in the 1.000 dm³ of solution.

Fill in the Blanks

27.82 g of hydrated sodium carbonate crystals, Na₂CO₃. xH₂O, was dissolved in water and made up to 1.000 dm³. 25.00 cm³ of this solution was neutralized by 48.80 cm³ of hydrochloric acid of concentration 0.1000 mol dm^-3.

(d) Calculate the mass of water in the hydrated crystals.

Fill in the Blanks

27.82 g of hydrated sodium carbonate crystals, Na₂CO₃. xH₂O, was dissolved in water and made up to 1.000 dm³. 25.00 cm³ of this solution was neutralized by 48.80 cm³ of hydrochloric acid of concentration 0.1000 mol dm^-3.

(d) Use the mass of water in the hydrated crystals to find the value of

x.