What is the perecentage yield of a reaction in which 200g PCl3 reacts with excess water to form 128g HCl according to the f. F reaction? PCl3 +3H2O=H3PO3+ 3HCl

The percentage yield is 80.36% (see calculations in attachment).

Explanation:

The theoretical  yield of the reaction is the amount of product that would result if all the  limiting reagent reacted. The theoretical yield is calculated using the balanced equation.

In practice, the actual yield, or the amount of  product actually obtained from a reaction, is almost always less than the theoretical  yield.

To determine how efficient this reaction is, we need to calculate the percent  yield, which describes the proportion of the actual yield to the theoretical yield. It is  calculated as follows:

First we need to make sure that the equation is properly balanced. In the question they provide the balanced equation.

Since water is in excess, we calculate the theoretical yield using PCl₃.

it would be a gas formation