Question

What would be the lab procedures for titrating lead nitrate out of water to find the...

What would be the lab procedures for titrating lead nitrate out of water to find the concentration of the lead nitrate?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Use excess of standard KI solution to dissolve the precipitate formed & then back titrate the KI used in excess by iodometry. The following reaction takes place when Pb (NO3)2 reacts with KI

Pb (NO3)2 + 2KI = PbI2 (s) + 2KNO3

PbI2 + 2KI = K2PbI4 (aq) ........ [colorless]

The appearance of colorless solution indicates completion of the reaction due to formation of soluble complex K2PbI4 . However, it should be desirable to use excess KI solution ,and then back titrate it with standard Na2S2O3 solution using starch as indicator.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it....
You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 77.9 mL left (the rest had evaporated). In addition, you forgot the initial concentration of the solution. You decide to take 2.00 mL of the solution and add an excess of a concentrated sodium chloride solution. You obtain a solid with a mass of 3.451 g. What was the concentration of the original lead(II)...
The concentration of lead ions (Pb2+) in a sample of polluted water that also contains nitrate...
The concentration of lead ions (Pb2+) in a sample of polluted water that also contains nitrate ions (NO3-) is determined by adding sodium sulfate (Na2SO4) to exactly 500mL of the water. Calculate the molar concentration of Pb2+ if 0.0335g of Na2SO4 was needed for the complete precipitation of Pb2+ ions as PbSO4.
A sample of lead (II) nitrate dissolved in 173.2 g of water is heated to 50...
A sample of lead (II) nitrate dissolved in 173.2 g of water is heated to 50 C, what is the maximum amount of lead (II) nitrate that can be dissolved? I know that the answer is about 147 g but do not understand how to get this answer.
What colour change will occur when titrating chloride with silver nitrate solution using potassium chromate as...
What colour change will occur when titrating chloride with silver nitrate solution using potassium chromate as indicator?
Sodium fluoride and lead nitrate are both soluble in water. If 0.0946 g of NaF and...
Sodium fluoride and lead nitrate are both soluble in water. If 0.0946 g of NaF and 0.362 g of Pb(NO3)2 are dissolved in sufficient water to make 1.50 L of solution, will a precipitate form? How do you know if there should be a precipitate or not? What is the chemical formula for the possible precipitate? The Ksp for lead fluoride is 3.7 x 10-8.
Comment on the feasibility of titrating pyridine in water and suggest other solvents that would be...
Comment on the feasibility of titrating pyridine in water and suggest other solvents that would be satisfactory for the titration of pyridine.
A chemist prepares a solution of sodium nitrate (NaNO3) by measuring out 286. umol of sodium...
A chemist prepares a solution of sodium nitrate (NaNO3) by measuring out 286. umol of sodium nitrate into a 450. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's sodium nitrate solution. round your answer to 3 significant digits.
In this lab, the point was to find out if mass and volume are conserved in...
In this lab, the point was to find out if mass and volume are conserved in a chemical experiment. Water was added to water and measurments were taken. Then, Water was added to acetone and the same measurement were taken. I know that mass is conserved and volume is not. I do not understand the following questions: Does the order of adding water to acetone or acetone to water change anything? Why or why not? During this particular experiment, the...
What is the solubility of lead iodide in a solution of 0.14 M lead nitrate, Pb(NO3)2?...
What is the solubility of lead iodide in a solution of 0.14 M lead nitrate, Pb(NO3)2? Ksp of PbI2 = 9.8x10-9
A 5.000 g mixture contains strontium nitrate and potassium bromide. Excess lead(II) nitrate solution, Pb(NO3)2 (aq)...
A 5.000 g mixture contains strontium nitrate and potassium bromide. Excess lead(II) nitrate solution, Pb(NO3)2 (aq) is added to precipitate out 0.7822 grams of PbBr2 (s). What is the percent by mass of potassium bromide in the mixture? What is the percent by mass of strontium nitrate in the mixture?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT