Salt preparation 1

Which of the following salts is prepared by precipitation method?

• sodium chloride

• barium sulfate

• calcium nitrate

• ammonium carbonate

How would you prepare a sample of potassium chloride safely in the laboratory?

• Add excess potassium metal to dilute hydrochloric acid

• Titrate dilute HCl with aqueous KOH with an indicator

• Titrate dilute HCl with aqueous KOH once with indicator, then again without

• Mix aqueous potassium nitrate with aqueous sodium chloride

Which of the following methods is used to prepare zinc sulfate?

• Add excess zinc chloride to aqueous sodium sulfate

• Tiltrate dilute H₂SO₄ with aqueous Zn(OH)₂ with an indicator, then again without

• Add excess solid zinc oxide to dilute sulfuric acid

• Mix aqueous zinc nitrate with aqueous potassium sulfate

After titrating aqueous NaOH with dilute HCl without indicator, what is my next step to obtain a sample of NaCl ?

• Filtration

• Evaporation to dryness

• Repeat the titration

• Evaporate to saturation, then cool the solution

After adding aqueous Ca(NO₃)₂ to dilute H₂SO₄, what is my next step to prepare a sample of CaSO₄?

• Crystallisation

• Evaporation to dryness

• Filtration to get the filtrate

• Filtration to get the residue

Which two solutions, when mixed together, will form a precipitate?

• dilute hydrochloric acid and barium nitrate

• dilute sulfuric acid and sodium hydroxide

• dilute hydrochloric acid and lead (II) nitrate

• dilute nitric acid and zinc chloride

How can I prepare a sample of copper(II) sulfate?

• Add excess Cu metal to H₂SO₄

• Add Cu(NO₃)₂ (aq) to Na₂SO₄(aq)

• Add excess CuCO₃ to H₂SO₄

• Titrate Cu(OH)₂ to NaOH

What is a Salt?

• Food seasoning

• When a hydrogen ion is replaced by a metal to form a compound

• When a metal ion is replaced by a hydrogen ion to form a compound

• None of the above

Sodium, Potassium and Ammonium salts are insoluble

• TRUE

• FALSE

Are all nitrates soluble?

• YES

• NO