Question

For the reaction IO3- + 5I- + 6H+ → 3I2 + 3H2O the rate of disappearance of I- at a particular time and concentration is 5.0 x 10-3 Ms-1. What is the rate of disappearance of H+ in Ms-1?
6.0 x 10-3
3.0 x 10-3
-5.0 x 10-3
1.0 x 10-3
5.0 x 10-3

Answer 1

Question #81533, Chemistry / Physical Chemistry

Question:

For the reaction $\mathrm{IO3 - + 5I - + 6H + \rightarrow 3I2 + 3H2O}$ the rate of disappearance of $I^-$ at a particular time and concentration is $5.0 \times 10^{-3} \mathrm{~Ms^{-1}}$. What is the rate of disappearance of $H^+$ in Ms-1?

- 6.0 x 10⁻³

- 3.0 x 10⁻³

- -5.0 x 10⁻³

- 1.0 x 10⁻³

- 5.0 x 10⁻³

Solution:

$$V = (-1/5)^* (\dc(I^-) / dt) = (-1/6)^* (\dc(H^+) / dt)$$

Let $\dc(H^+) / dt = x$, then

$$(-1/5)^* 5.0 \times 10^{-3} = (-1/6)^* x$$ $$x = 6.0x 10^{-3}$$

Answer: $(\dc(H^+) / dt) = 6/0 \times 10^{-3}$

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