Chemistry: Bases and Alkalis

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What is a common characteristic of a base?

It is a neutron acceptor

It is a proton acceptor (correct)

It is an electron donor

It is a proton donor

Which of the following is an example of a soluble base?

MgO

NaOH (correct)

FeO

Fe2O3

What is the reaction between NH3 and H+?

NH3 + H+ → NH4+ (correct)

NH3 + H+ → NH2+

NH3 + H+ → NH5+

NH3 + H+ → NH3H+

What is the formula of iron(II) hydroxide?

Fe(OH)2 Signup and view all the answers

Which of the following is NOT a metal oxide?

Mg(OH)2 Signup and view all the answers

What is the range of the pH scale?

0 to 14 Signup and view all the answers

What is the pH of a neutral substance?

7 Signup and view all the answers

What is the term for a substance with a pH below 7?

Acid Signup and view all the answers

What is the term for a substance with a pH above 7?

Alkali Signup and view all the answers

What is the pH of a very alkaline substance?

14 Signup and view all the answers

What color does Litmus turn when added to an acid?

Red Signup and view all the answers

In which condition does Thymolphtalein remain colorless?

In acid Signup and view all the answers

What color does Methyl orange turn when added to an alkali?

Yellow Signup and view all the answers

What color does Red Litmus turn when added to an alkali?

Blue Signup and view all the answers

What color does Thymolphtalein turn when added to an alkali?

Blue Signup and view all the answers

What is the role of filtering the mixture in the preparation of soluble salts?

To remove the excess of metal Signup and view all the answers

What is the product of the reaction between MgCO3(s) and HCl(aq)?

MgCl2(aq) Signup and view all the answers

What is the purpose of allowing the filtrate to evaporate?

To concentrate the solution Signup and view all the answers

What is the reactant that is used in excess in the preparation of MgCl2(aq)?

MgCO3(s) Signup and view all the answers

What is the last step in the preparation of soluble salts?

Allowing the crystals to dry Signup and view all the answers

What is the role of Ca(s) in the preparation of CaCl2(aq)?

It reacts with HCl(aq) to produce CaCl2(aq) Signup and view all the answers

What is the product of the reaction between Na₂O and 2HCl?

NaCl + H₂O Signup and view all the answers

What is the reaction between 2KOH and H₂SO₄?

K₂SO₄ + 2H₂O Signup and view all the answers

What is the product of the reaction between Ca(OH)₂ and 2HNO₃?

Ca(NO₃)₂ + H₂O Signup and view all the answers

What is the reaction between MgO and 2HCl?

MgCl₂ + H₂O Signup and view all the answers

What is the product of the reaction between KOH and NH₄Cl?

KCl + NH₃ + H₂O Signup and view all the answers