Chapter 3: Q84P (page 134)

What is the percent yield of a reaction in which 200. g of phosphorus trichloride reacts with excess water to form 128 g of HCl and aqueous phosphorous acid $(H_{3} {PO}_{3})$ ?

Short Answer

Expert verified

Percent yield for the given process is 80.6%.

Step by step solution

Writing balanced equation

First of all, let us check the balanced equation to find the percent yield:

${PCI}_{3} + 3 H_{2} O \overset{}{\to} H_{3} {PO}_{3} + 3 HCI$

From the equation we can say that 1 mol of PCl₃ gives three moles of HCl.

Calculating Moles of PCl3

Moles can be calculated as

$Moles of {PCI}_{3} = \frac{Mass of {PCI}_{3}}{Molar mass} = \frac{200}{137.33} = 1.45$

From the balanced equation we can say that,

$3 \times Moles of {PCI}_{3} = Moles of HCI = 4.35$

Theoretical yield

The maximum possible mass of a product that can be formed in a chemical reaction, is known as its theoretical yield. Hence, Theoretical yield of HCl is

Mass of HCI = Moles \times Molar mass = 4.35 \times 36.5 = 158.775 g

Percent yield calculation

Mass of HCl actually formed = 128 g (given)

Percent yield can be calculated using the given formula:

$Percent yield = \frac{Actual yield}{theoritical yield} \times 100 = \frac{128}{158.775} \times 100 = 80.6 %$

So, Percent yield for the given process is 80.6%.

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What is the percent yield of a reaction in which 200. g of phosphorus trichloride reacts with excess water to form 128 g of HCl and aqueous phosphorous acid $(H_{3} {PO}_{3})$ ?

Short Answer

Step by step solution

Writing balanced equation

Calculating Moles of PCl3

Theoretical yield

Percent yield calculation

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What is the percent yield of a reaction in which 200. g of phosphorus trichloride reacts with excess water to form 128 g of HCl and aqueous phosphorous acid(H3PO3) ?

Short Answer

Step by step solution

Writing balanced equation

Calculating Moles of PCl3

Theoretical yield

Percent yield calculation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Kinetics

Nuclear Chemistry

Chemical Reactions

Physical Chemistry

Chemical Analysis

Organic Chemistry

Study anywhere. Anytime. Across all devices.

What is the percent yield of a reaction in which 200. g of phosphorus trichloride reacts with excess water to form 128 g of HCl and aqueous phosphorous acid $(H_{3} {PO}_{3})$ ?