Question

balance the chemical equation by selecting the appropriate coefficient for each substance. enter 1 if the coefficient is 1. do not leave it blank. a. b. c. d. al(s) + h₃po₄(aq) → alpo₄(aq) + h₂(g) 1. 1 2. 2 3. 3 4. 4 5. 5 6. 6 7. 7 8. 8 9. 9

Explanation:

Step1: Count atoms on both sides

• Left side: \(1\) \(Al\), \(3\) \(H\), \(1\) \(P\), \(4\) \(O\)
• Right side: \(1\) \(Al\), \(2\) \(H\), \(1\) \(P\), \(4\) \(O\)

Step2: Balance hydrogen atoms

• Multiply \(H_3PO_4\) by \(2\) and \(H_2\) by \(3\) to balance \(H\) atoms (\(2\times3 = 6\) on left, \(3\times2=6\) on right)
• Now equation: \(Al + 2H_3PO_4

ightarrow AlPO_4+3H_2\)

Step3: Balance \(Al\) and \(P\) atoms

• Multiply \(Al\) and \(AlPO_4\) by \(2\) to balance \(Al\) and \(P\) (\(2\) \(Al\) and \(2\) \(P\) on both sides)
• Final equation: \(2Al + 2H_3PO_4 = 2AlPO_4+3H_2\)

Answer:

\(2\) \(Al\), \(2\) \(H_3PO_4\), \(2\) \(AlPO_4\), \(3\) \(H_2\)