Question

1. determine whether or not each equation is balanced or not.
2. using different colors, underline the reactants and the product. make a key to tell which colors you used for reactants and products.
3. circle all subscripts and underline all coefficients.
4. albr₃ + k → kbr + al is this equation balanced? _____________
5. p₄ + br₂ → pbr₃ is this equation balanced? _____________
6. 2licl + br₂ → 2libr + cl₂ is this equation balanced? _____________

Explanation:

Step1: Analyze the first equation \(AlBr_3 + K

ightarrow KBr+Al\)

• Reactants:
• Elements: \(Al\), \(Br\), \(K\)
• Atom counts: \(Al = 1\), \(Br = 3\), \(K = 1\)
• Products:
• Elements: \(K\), \(Br\), \(Al\)
• Atom counts: \(K = 1\), \(Br = 1\), \(Al = 1\)

Since \(Br\) atom counts are different (\(3\) in reactants vs \(1\) in products), the equation is not balanced.

Step2: Analyze the second equation \(P_4+Br_2

ightarrow PBr_3\)

• Reactants:
• Elements: \(P\), \(Br\)
• Atom counts: \(P = 4\), \(Br = 2\)
• Products:
• Elements: \(P\), \(Br\)
• Atom counts: \(P = 1\), \(Br = 3\)

Since \(P\) and \(Br\) atom counts are different (\(P:4\) vs \(1\), \(Br:2\) vs \(3\)), the equation is not balanced.

Step3: Analyze the third equation \(2LiCl + Br_2

ightarrow 2LiBr+Cl_2\)

• Reactants:
• Elements: \(Li\), \(Cl\), \(Br\)
• Atom counts: \(Li = 2\), \(Cl = 2\), \(Br = 2\)
• Products:
• Elements: \(Li\), \(Br\), \(Cl\)
• Atom counts: \(Li = 2\), \(Br = 2\), \(Cl = 2\)

Since atom counts for all elements (\(Li\), \(Cl\), \(Br\)) are the same in reactants and products, the equation is balanced.

Answer:

1. Not balanced
2. Not balanced
3. Balanced