Zadanie 33
Which equation correctly represents a reaction of dilute sulfuric acid? A. H2SO4 + MgCO3 → MgSO4 + CO2 + H2O B. H2SO4 + 2 Ag → Ag2SO4 + H2 C. H2SO4 + 2 KOH → K2SO4 + H2 D. H2SO4 + 2 NaHCO3 → Na2SO4 + 2 H2O
Reactions of metals with acids
Write balanced and ionic equations for reactive metals such as magnesium, zinc and iron reacting with dilute hydrochloric and sulfuric acid to release hydrogen, and identify them as redox reactions in which the metal is oxidized.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2022–2025.
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Zadanie 32
Which reactions involve the transfer of a proton? I. CH3COOH(aq) + NH3(aq) → CH3COONH4(aq) II. 2 CH3COOH(aq) + Mg(s) → (CH3COO)2Mg(aq) + H2(g) III. CH3COOH(aq) + NaHCO3(s) → CH3COONa(aq) + H2O(l) + CO2(g) A. I and II only B. I and III…
Zadanie 29
Zinc reacts with an aqueous solution of ethanoic acid. Zn(s) + 2 CH3COOH(aq) → Zn(CH3COO)2(aq) + H2(g) Which combination shows the role of the acid and the gas formed? A. oxidizing agent, H2(g) B. oxidizing agent, CO2(g) C. reducing agent,…
Zadanie 29
Magnesium ribbon is added to aqueous ethanoic acid. Which combination gives the role of the acid and a product formed from it? A. Oxidizing agent, H2(g) B. Oxidizing agent, CO2(g) C. Reducing agent, H2(g) D. Reducing agent, CO2(g)
Zadanie 2a
Suggest an experiment that shows that zinc is more reactive than copper, giving the observation that would confirm this.