1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
qaws [65]
3 years ago
6

An aqueous solution containing 7.96 g7.96 g of lead(II) nitrate is added to an aqueous solution containing 6.82 g6.82 g of potas

sium chloride. Enter the balanced chemical equation for this reaction. Be sure to include all physical states. balanced chemical equation: What is the limiting reactant? potassium chloride lead(II) nitrate The percent yield for the reaction is 89.3%89.3% . How many grams of precipitate is recovered? precipitate recovered: gg How many grams of the excess reactant remain? excess reactant remaining: g
Chemistry
1 answer:
Eduardwww [97]3 years ago
4 0

<u>Answer:</u> Lead nitrate is the limiting reagent and potassium chloride is the excess reagent. the amount of excess reagent left is 3.205 grams. The amount of precipitate (lead chloride) recovered is 5.96 g.

<u>Explanation:</u>

To calculate the number of moles, we use the equation

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}   ....(1)

  • <u>For lead nitrate:</u>

Given mass of  lead nitrate = 7.96 g

Molar mass of  lead nitrate = 331.2 g/mol

Putting values in above equation, we get:

\text{Moles of  lead nitrate}=\frac{7.96g}{331.2g/mol}=0.024mol

  • <u>For potassium chloride:</u>

Given mass of potassium chloride = 6.82 g

Molar mass of potassium chloride = 74.55 g/mol

Putting values in above equation, we get:

\text{Moles of potassium chloride}=\frac{6.82g}{74.55g/mol}=0.091mol

  • For the given chemical equation:

Pb(NO_3)_2(aq.)+2KCl(aq.)\rightarrow PbCl_2(s)+2KNO_3(aq.)

By Stoichiometry of the reaction:

1 mole of lead nitrate reacts with 2 moles of potassium chloride.

So, 0.024 moles of lead nitrate will react with = \frac{1}{2}\times 0.024=0.048moles of potassium chloride

As, given amount of potassium chloride is more than the required amount. So, it is considered as an excess reagent.

Thus, lead nitrate is considered as a limiting reagent because it limits the formation of product.

  • Amount of excess reagent (potassium chloride) left = 0.091 - 0.048 = 0.043 moles

Now, calculating the mass of potassium chloride from equation 1, we get:

Given mass of potassium chloride = 6.82 g

Molar mass of potassium chloride = 74.55 g/mol

Putting values in above equation, we get:

0.043mol=\frac{\text{Mass of potassium chloride}}{74.55g/mol}\\\\\text{Mass of potassium chloride}=3.205g

By Stoichiometry of the reaction:

1 mole of lead nitrate produces 1 mole of lead chloride.

So, 0.024 moles of lead nitrate will produce = \frac{1}{1}\times 0.024=0.024moles of lead chloride

  • Now, calculating the mass of lead chloride from equation 1, we get:

Molar mass of lead chloride = 278.1 g/mol

Moles of lead chloride = 0.024 moles

Putting values in equation 1, we get:

0.024mol=\frac{\text{Mass of lead chloride}}{278.1g/mol}\\\\\text{Mass of lead chloride}=6.6744g

We are given:

Percentage yield of the reaction = 89.3 %

So, amount of lead chloride recovered will be = \frac{89.3}{100}\times 6.6744g=5.96g

Hence, lead nitrate is the limiting reagent and potassium chloride is the excess reagent. the amount of excess reagent left is 3.205 grams. The amount of precipitate (lead chloride) recovered is 5.96 g.

You might be interested in
Which is the strongest acid? Ch3ch2ch2chfch2co2h ch3ch2ch2cbr2ch2co2h ch3ch2ch2cf2ch2co2h ch3chbrch2ch2ch2co2h ch2clch2ch2ch2ch2
liq [111]

The strength of an acid increases if the stability of conjugate base increases

The stability of a conjugate base increases with the presence of electron with drawing group (electronegative group)

Thus more the electronegativity of an atom attached to a carboxylic acid higher the strength of acid

In these examples CH3CH2CH2CF2CH2COOH contains to electronegative flourine atoms which stabilizes the conjugate base hence this will be the strongest acid among the given acids

8 0
3 years ago
A shorter electromagnetic wave is _____.
EleoNora [17]
The correct answer is hotter
7 0
2 years ago
A sample of carbon monoxide gas is initially in a 5858 mL container. The gas is then moved to 3.29 L container at a temperature
Doss [256]

Answer:

d i took the test

Explanation:

5 0
3 years ago
Please help me this is a quiz gde
wel

An not sure,, but maybe 24. don't take my word for it

5 0
2 years ago
Confused as heck. please help!
Nitella [24]

Answer: that all thre water cycle and C is vaporation

Explanation:

6 0
2 years ago
Other questions:
  • What causes the appearance of lines in an emission spectrum?
    7·2 answers
  • "Science" and "technology are words that often are mixed up, even though they have
    14·1 answer
  • why is it easier for water to flow through rock and sediment with larger pores than through rock and sediment with smaller pores
    9·2 answers
  • Which has a higher mass percent of magnesium mgo or mg3n2?
    12·1 answer
  • A student has an unknown sample. How can spectroscopy be used to identify the sample?
    8·2 answers
  • Which explains the basis of the biuret test?
    15·1 answer
  • 1. A container holds four times as many moles of CO2 as O2. If the total pressure in the container is 20. atm,
    8·1 answer
  • I NEED HELP THIS IS DUE TMR!
    14·1 answer
  • Sorry for asking for too much but me needs helppppp
    12·2 answers
  • What is the electron confiquation for <br> for the element Re
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!