Post a New Question

Chemistry

posted by .

1. Take a clean test tube from the Glassware shelf and place it on the workbench. Add 1 mL your mystery solution to the test tube.

2. PRECIPITATION BY NaC2H3O2(aq)

(a) Add 2 mL of sodium acetate solution to the test tube.

(b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. (Decanting is the same as pouring, but clicking the "decant" option instead of entering an amount). Proceed to step 3 using the test tube containing decanted liquid.

(c) If no white precipitate forms, proceed to step 3.

3. PRECIPITATION BY NaCl(aq)
(a) To a test tube that contains only liquid and no precipitate, add 2 mL of sodium chloride solution.

(b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. (Decanting is the same as pouring, but clicking the "decant" option instead of entering an amount). Proceed to step 4 using the test tube containing decanted liquid.


(c) If no white precipitate forms, proceed to step 4.

4. PRECIPITATION BY Na2SO4(aq)

(a) To a test tube that contains only liquid and no precipitate, add 2 mL of sodium sulfate solution.

(b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. (Decanting is the same as pouring, but clicking the "decant" option instead of entering an amount). Proceed to step 5.

(c) If no white precipitate forms, proceed to step 5.

5. You have completed the lab. Use your results to complete the assignment.


Question #1 :

1. Which ions did you determine to be present in the mystery solution?

2. Write the net ionic equations for the formation of the three possible precipitates formed in steps 2, 3 and 4.

3. Explain how you could use flame tests to verify identity of the precipitates formed in each step.

  • Chemistry -

    See above response about what you don't understand.

  • Chemistry -

    I don't understand how to write the net ionic equations for the foration of the three possible precipitates formed in steps 2 3 and 4

    im guessing for number 1 we are dealing with barium and siver for sure

    and i don't understand 3 at all

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chem

    In the lab, you're handed a test tube with sodium chloride dissolved in water. You add aqueous barium carbonate to the tube. What are your observations?
  2. Chemistry!!!

    Use Le' Chatelier's Principle. a solution at equilibrium: BaCrO4(s)<> Ba^2+(aq)+ Cr)4^-(aq)recall: 2CrO4^2-(aq)+ 2H^+(aq)<> Cr2O7^2-(aq) +H20 2CrO4^2- yellow Cr2O7^2- orange Make predictions about colour changes or changes …
  3. Chemistry

    PRECIPITATION BY NaC2H3O2(aq) (a) Add 2 mL of sodium acetate solution to the test tube. (b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. …
  4. Chemistry 12

    Hello fellow comrades, I was assigned the sulphur clock reaction lab and I'm a tad bit confused by it. Anyway, here's the lab procedure: 1. take 5 test tubes, labeled a,b,c,d and e. accurately measure out 10.0 ml of .20M sodium thiosulphate …
  5. Chemistry

    You have 20mL of a solution of concentration 0.015mg/mL of x in test tube #1. Prepare serial dilutions of your stock solution, and calculated the concentration of x as follows: Add 10mL of distilled water and 10mL of stock solution …
  6. Solubility/English

    Ok so I have this procedure to rewrite in past tense passive voice please help me out here I have alot ofthings to do with this lab...your help isgreatly appreciated. Thankyou! 1) Set up a hot-water both by placing th 250/400mL beaker, …
  7. Chemistry

    Reaction 6 1. Place a piece of mossy zinc in a test tube 2 add hydrochloric acid solution to the test tube until the mossy zinc is completely covered What gas was released in reaction 6 and how could you test the gas to confirm its …
  8. Chemistry check my answers

    Please check my answers For each of the 7 reactions in this experiment, write a balanced equation and classify it as a synthesis, decomposition, single replacemnt, neutralization, or double replacement reaction. Reaction 1 1)Adjust …
  9. Chemistry

    Three colorless solutions in test tubes, with no labels, are in a test tube rack on the lab bench. Lying beside the test tubes are three labels: potassium iodide, KI, silver nitrate, AgNO3, and sodium sulfide, Na2S. You are to place …
  10. chemistry

    You measure out 3.00 mL of 0.100 M Co(NO3)2, place it in a test tube and add 7.00 mL of water. What is the concentration of the diluted solution in the test tube?

More Similar Questions

Post a New Question