Question

Solve Problem 9 ifgrams of chemicalis present initially. At what time is the chemicalhalf-formed?

Short answer

Answer

The limiting chemicalis

The time at which the chemical C is half-formed

Step-by-step solution

Define the law of Mass.

The law of mass action states that when no temperature change is involved, the rate at which the two substances react is proportional to the product of the amounts of andthat are untransformed (remaining) at time.

Step 2Find the rate of change of the reaction.

The amount used in mixing chemical A in the mix is twice that of the chemical B

When the condition is;

The chemical C formed after 20min.

Now find the proportionality constant.

When the point condition

Then we have;

Put the value of c2 in equation (2)

Put the point of condition

Then we have

Substitute the value of constant C.

Find the amount of limiting chemical after a long time.

Find the half of the amount in chemical C

Now obtain the half-formed chemical C by putting.

Then we have;

The amount of half chemical C time is.