Oquizy

John wants to prepare sodium chloride in the lab using an acid and a base. Which pair of reactants should he choose?

Hydrochloric acid and lead(II) nitrate Hydrochloric acid and sodium hydroxide Nitric acid and magnesium Sulfuric acid and copper(II) oxide

Xinyi challenges John: 'If 1000 moles of nitrogen react with excess hydrogen at 250 atm and 450°C, assuming 15% conversion per pass, how many moles of ammonia are produced in one pass?'

1000 150 300 500

A solution has a pH of 4. After diluting it 100 times with water, what is the approximate pH? (pH is the negative log (base 10) of the concentration of hydrogen ions, measured in mol/dm³)

2 4 6 8

During a science practical, Xinyi mixed hydrochloric acid with sodium hydroxide. What is the ionic equation for this reaction?

2H⁺ + 2OH⁻ → 2H₂ + O₂ H⁺ + Cl⁻ → HCl H⁺ + OH⁻ → H₂O Na⁺ + OH⁻ → NaOH

Which of the following statements about solubility is true?

All carbonates are soluble in water All chlorides are soluble, including silver chloride All nitrates are soluble, including lead(II) nitrate All sulfates are soluble except those of potassium and sodium

John wants to prepare copper(II) sulfate crystals using an insoluble base. Which steps should he follow?

Add excess copper(II) oxide to warm sulfuric acid, filter, then crystallise the filtrate Mix copper(II) sulfate with sodium chloride and evaporate React copper(II) oxide with sodium hydroxide, then crystallise Titrate copper(II) oxide with sulfuric acid directly

Quiz: Chemistry - Acid-Base Chemistry