Multiple Choice
Which of the following correctly labels each species in the chemical equation: NaOH + HCl → NaCl + H2O?
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3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
Predict the products and provide the balanced equation for the reaction: Ag2SO4(aq) + NaCl(aq) →
A
Ag2SO4(s) + NaCl(aq); Ag2SO4(aq) + NaCl(aq) → Ag2SO4(s) + NaCl(aq)
B
AgNa(aq) + SO4Cl2(aq); Ag2SO4(aq) + 2NaCl(aq) → 2AgNa(aq) + SO4Cl2(aq)
C
AgCl(s) + Na2SO4(aq); Ag2SO4(aq) + 2NaCl(aq) → 2AgCl(s) + Na2SO4(aq)
D
Ag2Cl2(s) + Na2SO4(aq); Ag2SO4(aq) + 2NaCl(aq) → Ag2Cl2(s) + Na2SO4(aq)
Verified step by step guidance1
Identify the type of reaction: This is a double displacement (metathesis) reaction where the cations and anions of the reactants exchange partners.
Write the formulas of the reactants: Silver sulfate is \(\mathrm{Ag_2SO_4}\) and sodium chloride is \(\mathrm{NaCl}\) in aqueous solution.
Exchange the ions: Silver (\(\mathrm{Ag^+}\)) will pair with chloride (\(\mathrm{Cl^-}\)) to form silver chloride, and sodium (\(\mathrm{Na^+}\)) will pair with sulfate (\(\mathrm{SO_4^{2-}}\)) to form sodium sulfate.
Write the formulas of the products: Silver chloride is \(\mathrm{AgCl}\) and sodium sulfate is \(\mathrm{Na_2SO_4}\).
Balance the chemical equation by ensuring the number of atoms of each element is the same on both sides. Since silver sulfate has 2 silver ions, you need 2 moles of sodium chloride to produce 2 moles of silver chloride and 1 mole of sodium sulfate. The balanced equation is: \(\mathrm{Ag_2SO_4 (aq) + 2NaCl (aq) \rightarrow 2AgCl (s) + Na_2SO_4 (aq)}\).
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