Multiple Choice
Which of the following is the correctly balanced chemical equation for the reaction: io3−(aq) + h2so3(aq) → i2(aq) + so42−(aq)?
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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
When the following equation is balanced, what is the coefficient in front of H2O?___ Ba(OH)2 + ___ H3PO4 → ___ H2O + ___ Ba3(PO4)2
A
1
B
2
C
3
D
4
E
5
F
6
G
none of the above
Verified step by step guidance1
Identify the chemical equation to be balanced: Ba(OH)2 + H3PO4 → H2O + Ba3(PO4)2.
List the number of atoms of each element on both sides of the equation. Initially, you have: Ba: 1, O: 2, H: 5, P: 1 on the reactant side and Ba: 3, O: 8, H: 2, P: 2 on the product side.
Balance the barium (Ba) atoms by placing a coefficient of 3 in front of Ba(OH)2, resulting in 3 Ba atoms on both sides.
Balance the phosphorus (P) atoms by placing a coefficient of 2 in front of H3PO4, resulting in 2 P atoms on both sides.
Balance the hydrogen (H) and oxygen (O) atoms by placing a coefficient of 6 in front of H2O, ensuring that the number of H and O atoms are equal on both sides of the equation.
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