Multiple Choice
Which statement best describes the formula equation Cl_2(g) + 2KBr(aq) \rightarrow 2KCl(aq) + Br_2(l)?
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3. Chemical Reactions
Balancing Chemical Equations
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which additional product balances the reaction H_2SO_4 + 2NaOH → Na_2SO_4 + ________?
A
2H_2O
B
O_2
C
Na_2O
D
H_2
Verified step by step guidance1
Identify the type of reaction: This is an acid-base neutralization reaction where sulfuric acid (H_2SO_4) reacts with sodium hydroxide (NaOH), a strong base.
Write the formulas of the reactants and the known product: H_2SO_4 + 2NaOH → Na_2SO_4 + ________.
Recall that in neutralization reactions between an acid and a base, the products are typically a salt and water. Here, Na_2SO_4 is the salt formed from NaOH and H_2SO_4.
Balance the hydrogen and oxygen atoms by adding water molecules (H_2O) as the other product. Since 2 moles of NaOH react with 1 mole of H_2SO_4, the number of water molecules formed will correspond to the number of hydroxide ions neutralizing the acid protons.
Write the balanced equation including water: H_2SO_4 + 2NaOH → Na_2SO_4 + 2H_2O, confirming that all atoms are balanced on both sides.
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