Question

1. Suppose that the reaction A to B has a rate=k[A]^1. How would the reaction rate change if

[A] was tripled?

[A] was halved?

2. Suppose that the reaction 2A to B has a Rate=k[A]^2. How would the reaction rate change if

[A] was tripled ?
[A] was halved?


3. Suppose that the reaction A+B to C has a rate law of Rate=k[A]^1[B]^1. How would the reaction rate change if

[A] was doubled
[A] and [B] each doubled
[A] doubled and [B] Halved

Answer 1

Answer on Question #58034, Chemistry / General Chemistry

1. Suppose that the reaction A to B has a rate = k[A]^1. How would the reaction rate change if

[A] was tripled?

[A] was halved?

2. Suppose that the reaction 2A to B has a Rate = k[A]^2. How would the reaction rate change if

[A] was tripled?

[A] was halved?

3. Suppose that the reaction A+B to C has a rate law of Rate = k[A]^1[B]^1. How would the reaction rate change if

[A] was doubled

[A] and [B] each doubled

[A] doubled and [B] Halved

**Solution:**

1. If [A] was tripled, then a rate = k(3[A])^1 = 3 k[A]^1.

**Answer.** The rate is tripled.

If [A] was halved, then a rate = k(0.5[A])^1 = 0.5 k[A]^1.

**Answer.** The rate is halved.

2. If [A] was tripled, then a rate = k(3[A])^2 = 9 k[A]^1.

**Answer.** The rate increased 4 times.

If [A] was halved, then a rate = k(0.5[A])^2 = 0.25 k[A]^1.

**Answer.** The rate fell in 4 times.

3. If [A] was doubled, then a rate = k(2[A])^1[B]^1 = 2 k[A]^1[B]^1.

**Answer.** The rate is doubled.

If [A] and [B] each doubled, then a rate = $k(2[A])^1 (2[B])^1 = 4k[A]^1[B]^1$. Answer. The rate increased 4 times.

If [A] doubled and [B] halved, then a rate = $k(2[A])^1 (0.5[B])^1 = k[A]^1[B]^1$. Answer. The rate is constant.