10 Questions
Match the following conjugate acid-base pairs:
H2O = OH- HCl = Cl- NH4+ = NH3 H2SO4 = HSO4-
Pair the following acids with their corresponding conjugate bases:
HNO3 = NO3- HF = F- H3PO4 = H2PO4- HBr = Br-
Match the acids with their respective conjugate acids:
CH3COOH = CH3COO- H2CO3 = HCO3- HSO4- = SO4^2- HClO2 = ClO2-
Match the following conjugate acid-base pairs based on the Bronsted-Lowry theory:
HCl, Cl- = Conjugate acid-base pair NH3, NH4+ = Conjugate acid-base pair H2O, H3O+ = Conjugate acid-base pair H2O, OH- = Not a conjugate acid-base pair
Match the following substances with their ability to act as both an acid and a base in the Brønsted-Lowry theory:
NH3 = Amphoteric substance H2O = Amphoteric substance HCl = Not an amphoteric substance Cl- = Not an amphoteric substance
Match the following conjugate acid-base pairs:
HC2O4- / H2C2O4 = Conjugate acid HNO2 / HNO3 = Conjugate acid C2O42- / HC2O4- = Conjugate base HNO3 / HNO2 = Conjugate base
Match the following definitions with the correct type of base according to Arrhenius theory:
A base that dissociates almost completely in water to give hydroxide ions = Strong base A substance that only slightly dissociates in water to give hydroxide ions = Weak base A substance that dissociates in water to produce OH- ions = Base A substance that almost completely dissociates in water to give hydroxide ions = Strong base
Match the following substances with their correct role in neutralisation:
Gaviscon (sodium hydrogen-carbonate) = Base to neutralise excess hydrochloric acid in stomach Lime (CaO) = Neutralises acidity in soil to improve crop yield Limestone (CaCO3) = Neutralises acidity in lakes affected by acid rain Toothpaste = Slightly basic to neutralise acids in food
Match the following bases with their level of dissociation in water according to Arrhenius definition:
NaOH = Strong base Mg(OH)2 = Weak base Ca(OH)2 = Weak base NH3 = Not a base under Arrhenius definition
Match the following pairs of products from neutralisation reactions:
NaCl + H2O + CO2 = Result of neutralising hydrochloric acid with sodium hydrogen-carbonate Ca(OH)2 = Product when calcium oxide reacts with water for soil neutralisation CaSO4 + H2O + CO2 = Result of neutralising sulfuric acid with limestone in lakes Water + Carbon dioxide = Byproduct of neutralising excess hydrochloric acid in the stomach with Gaviscon
Explore the differences between Arrhenius and Bronsted-Lowry theories of acids and bases. Learn about the concepts of strong and weak acids/bases, proton donors, and proton acceptors.
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