Question
Asked Oct 29, 2019
8 views

Calculate the number of moles of precipitate that would be produced when two solutions were mixed. 

a) 1.0 mL 0.10 M Pb(NO3)2 and 5.0 mL, 0.10 M KI

b) 2.0 mL 0.10 M Pb(NO3)2 and 4.0 mL, 0.10 M KI

c) 3.0 mL 0.10 M Pb(NO3)and 3.0 mL, 0.10 M KI

d) 4.0 mL 0.10 M Pb(NO3)2 and 2.0 mL, 0.10 M KI

e) 5.0 mL 0.10 M Pb(NO3)2 and 1.0 mL, 0.10 M KI

check_circle

Expert Answer

Step 1

PbI2 is precipitated when Pb(NO3)2 and KI.

help_outline

Image Transcriptionclose

Pb(NO),2 KI >2 KNO3 +Pbl2 1 mol Pb(NO), and 2 mol KI reacts to give 1 mol Pbl,

fullscreen
Step 2

(a)

Number of moles of precipitate (PbI2) formed is calculated as follows,

1 mL = 0.001 L

help_outline

Image Transcriptionclose

No. of moles Molarity x Volume (in L) No. of moles Pb (NO), = (0.10 M) (0.001 L)= 1x104 mol (0.10 M) (0.005 L) = 5x10 mol No. of moles KI 2x10 mol KI is needed to react with 1x 10 mol Pb(NO3) No. of mol KI> No. of mol of Pb(NO) Limiting reagent Pb(NO;), 1 mol PbI 1 mol Pb(NO) = 1x 10 mol PbI No.of mol of Pbl, = 1x10 mol Pb(NO ), Hence, 1x10 mol Pbl, is precipitated.

fullscreen
Step 3

(b)

Number of moles of precipitate (PbI2) form...

help_outline

Image Transcriptionclose

No. of moles Pb (NO3), = (0.10 M) (0.002 L)= 2x10 mol (0.10 M) (0.004 L)= 4x10 mol No. of moles KI mol KI is needed to react with 2 x10 mol Pb (NO3) 4x10 1 mol Pbl2 1 mol Pb(NO), 2x 10 mol PbI No.of mol of PbI, = 2 x10 mol Pb(NO3), x- Hence, 2x10 mol Pbl, is precipitated

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Chemistry

General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Calculate the final temperature when 50 mL of water at 80 C are added to 25 mL of water at 25 C. Can...

A: Given:Initial Temperature of hot water = 80 oCInitial Temperature of cold water = 25 oCVolume of hot...

question_answer

Q: A student observed that, when 0.243 g of magnesium was added to 100.0 g of hydrochloric acid, the te...

A: Many chemical reactions give off energy. Chemical reactions that release energy are called exothermi...

question_answer

Q: Using standard heats of formation, calculate the standard enthalpy change for the following reaction...

A: Given:NH4NO3(aq) →N2O(g) + 2H2O(l)

question_answer

Q: Part C HЕr Express your answer as a chemical equation. Identify all of the phases in your answer. AX...

A: The given equation:

question_answer

Q: The work function (Φ) for a metal is 6.10×10-19 J. What is the longest wavelength of electromagnetic...

A: Click to see the answer

question_answer

Q: The solubility of silver chloride can be increased by dissolving it in a solution containing ammonia...

A: The value of the equilibrium constant for the overall reaction can calculated as, 

question_answer

Q: How do I balance my equation "2H++e-->H2"?

A: The following equation is to be balanced-2H+ + e-→ H2

question_answer

Q: Coal is a leading source of energy for the world. While coal is primarily composed of carbon and hyd...

A: Given:S(s)+O2(g)→SO2(g)

question_answer

Q: A chemist adds 490.0mL of a 0.339M silver perchlorate AgClO4 solution to a reaction flask. Calculate...

A: Given that,490.0mL of 0.339M silver per chlorate solution.