Acids and bases Level 1 Science NCEA

What ion is produced by acids in solution?

• hydroxide OH^-

• hydrogen H⁺

• water H₂O

• sulfate SO₄^2-

Which is true of acids

• They taste bitter and feel soapy

• They taste bitter and are corrosive

• They taste sour and feel soapy

• They taste sour and are corrosive

Which is true?

• Jacob hates coffee

• Weak acids dissociate more than strong acids

• Strong acids dissociate more than weak acids

• Mr. Uele has greyer hair than Mr. Grigg

What are three common laboratory acids

• Hydrochloric (HCl), sulfuric (H₂SO₄) and nitric (HNO₃)

• Sodium hydroxide (NaOH) and potassium hydroxide (KOH)

• Hydrochloric (HCl) and sodium chloride (NaCl)

• sulfuric (H₂SO₄) and copper sulfate (CuSO₄)

Which ions are produced when the acids dissociate?

• Hydrochloric acid produces Cl^- ions

• Sulfuric acid produces H⁺ and Cl^- ions

• Sulfuric acid produces H⁺ and SO₄^2- ions

• Hydrochloric acid produces H⁺ ions

Which ions are produced when the acids dissociate?

• Hydrochloric acid produces H⁺ and Cl^- ions

• Nitric acid produces H⁺ and Cl^- ions

• Nitric acid produces NO₃^- ions

• Hydrochloric acid produces H⁺ ions

What ion is produced by alkalis in solution?

• hydroxide OH^-

• hydrogen H⁺

• water H₂O

• sulfate SO₄^2-

Which is true of bases

• They taste bitter and feel soapy

• They taste bitter and are corrosive

• They taste sour and feel soapy

• They taste sour and are corrosive

What are two common laboratory bases

• Sulfuric acid (H₂SO₄) and nitric acid (HNO₃)

• Sodium hydroxide (NaOH) and potassium hydroxide (KOH)

• Hydrochloric acid (HCl) and sodium chloride (NaCl)

• Sulfuric acid (H₂SO₄) and copper sulfate (CuSO₄)

What is the connection between a base and an alkali?

• An alkali contains oxygen whereas a base does not

• A base makes hydroxide ions ( OH^- ) in water whereas an alkali does not

• An alkali is a base that dissolves in water

• An alkali is a base that contains a metal ion