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VICChemistryQuick questions

Unit 2: How do chemical reactions shape the natural world?

Quick questions on Reactions of acids with metals, oxides, hydroxides and carbonates: VCE Chemistry Unit 2

7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is acid + metal?
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A metal above hydrogen in the activity series reacts with a dilute acid to give a salt and hydrogen gas:
What is acid + metal oxide?
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A metal oxide is a basic oxide. Adding it to an acid gives a salt and water:
What is acid + metal hydroxide?
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A metal hydroxide is a base. Adding it to an acid gives a salt and water:
What are observations?
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bubbles of hydrogen gas; the metal is consumed; the solution gets warmer (exothermic); test for H2H_2 with a glowing splint (it pops).
What is q1?
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Write balanced equations for: (a) magnesium with dilute hydrochloric acid; (b) sodium carbonate with sulfuric acid. State one observation for each. [4 marks]
What is q2?
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A 50.0mL50.0 \, \text{mL} volume of 0.250mol/L0.250 \, \text{mol/L} sulfuric acid is neutralised by sodium hydroxide solution. Calculate the mass of NaOH\text{NaOH} required. [3 marks]
What is q3?
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Consider an antacid tablet containing 0.500g0.500 \, \text{g} of CaCO3\text{CaCO}_3. (a) Write the equation with stomach HCl\text{HCl}. (b) Calculate the moles of acid neutralised.

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