Question

Sum of oxidation states of bromine in bromic acid and perbromic acid is ——-.

Hint:

The oxidation state of bromine in its oxoacids increases as the number of oxygen atoms increases.

Answer 1

Correct Answer: 12

To determine the sum of the oxidation states of bromine in bromic acid (HBrO₃) and perbromic acid (HBrO₄), we need to calculate each one separately:

Step 1: Oxidation state in bromic acid (HBrO₃)

In HBrO₃, assume the oxidation state of bromine (Br) is x.

The oxidation state of hydrogen (H) is +1, and the oxidation state of oxygen (O) is -2. The sum of oxidation states in a neutral compound is 0.

Setting up the equation based on HBrO₃:

1(x) + 1(+1) + 3(-2) = 0 → x + 1 - 6 = 0 → x - 5 = 0 → x = +5

Step 2: Oxidation state in perbromic acid (HBrO₄)

In HBrO₄, assume the oxidation state of bromine (Br) is y.

The compound is also neutral, so the sum of oxidation states equals 0.

Setting up the equation based on HBrO₄:

1(y) + 1(+1) + 4(-2) = 0 → y + 1 - 8 = 0 → y - 7 = 0 → y = +7

Step 3: Sum of oxidation states

The sum of oxidation states of bromine in both acids is: +5 (HBrO₃) + +7 (HBrO₄) = 12

Conclusion: The sum of oxidation states of bromine in bromic acid and perbromic acid is 12. This value is confirmed to be within the given range of 12,12.