Multiple Choice
In the reaction NaOH + HCl → NaCl + H2O, which molecules are the products?
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6. Chemical Quantities & Aqueous Reactions
Molecular Equations
Multiple Choice
In a molecular equation, what are the products when sulfuric acid reacts with calcium fluoride? (Assume an acid–salt reaction that produces hydrogen fluoride gas.)
A
and
B
and
C
and
D
and
Verified step by step guidance1
Identify the reactants: sulfuric acid (H\_2SO\_4) and calcium fluoride (CaF\_2).
Recognize that this is an acid–salt reaction where the acid reacts with the salt to produce hydrogen fluoride (HF) gas and a new salt.
Write the molecular equation showing the exchange of ions: the hydrogen ions (H\^+) from sulfuric acid will react with the fluoride ions (F\^-) from calcium fluoride to form HF gas.
Determine the other product by combining the remaining ions: calcium ions (Ca\^{2+}) from calcium fluoride and sulfate ions (SO\_4\^{2-}) from sulfuric acid form calcium sulfate (CaSO\_4).
Balance the equation by ensuring the number of atoms and charges are equal on both sides, noting that two HF molecules are produced for each formula unit of CaF\_2 reacting.
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