4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of NH4 via the "litmus test." In your own words, explain chemically...

Question

Question

4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of N

engineering Chemical-Engineering

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

4) When NaOH is added to unknown solution to test the presence of NH4⁺ ion, Ammonia NH3 gas is evolved. The alkali frees the Ammonia from the salts.

NH4⁺ + OH^- -------> NH3 + H2O

The Ammonia gas evolved converts red litmus to blue.

*If you like the answer give a thumbs up. For any queries feel free to use the comment section below.

Add a comment

Answer 2

Similar Homework Help Questions

QUALITATIVE ANALYSIS PROCEDURE: Place 1 ml of your unknown solution in a medium test tube. Add...

QUALITATIVE ANALYSIS PROCEDURE: Place 1 ml of your unknown solution in a medium test tube. Add 2 drops of 6 M HNO3, then 1 ml of 5 M NH4OH and stir. Centrifuge and decant the solution. Include the chemical equation for the positive test observed.
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...

Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for the empty spaces and question marks EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...

10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...

4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of NH4 via the "litmus test." In your own words, explain chemically...

Homework Answers

Add Answer to:
4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of NH4 via the "litmus test." In your own words, explain chemically...

Post as a guest

Earn Coins

QUALITATIVE ANALYSIS PROCEDURE: Place 1 ml of your unknown solution in a medium test tube. Add...

Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...

10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...

4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of NH4 via the "litmus test." In your own words, explain chemically...

Homework Answers

Add Answer to: 4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of NH4 via the "litmus test." In your own words, explain chemically...

Post as a guest

Earn Coins

QUALITATIVE ANALYSIS PROCEDURE: Place 1 ml of your unknown solution in a medium test tube. Add...

Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...

10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...

Add Answer to:
4. During the Qualitative Analysis Lab, you were instructed to add NaOH to the unknown solution to test for the presence of NH4 via the "litmus test." In your own words, explain chemically...