QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
I. Arrange the following steps chronologically. Use 1 as the first step, 2 for the second step and so on. Write the number before the letter.
A. Add 4 gtts of K^2CrO^4 into the centrifugate.
B. Place 10 drops of the solution to be analyzed in a test tube.
C. Dissolve the precipitate in 2 drops of concentrated nitric acid.
D. Add 6 - 7 drops of water and heat.
E. Discard the wash water
F. Keep the mixture hot in a steam bath
G. Test for the completeness of precipitation
H. Add 1 - 2 drops of SnCl 2
I. Instill 10 drops of 3F Ammonia
J. Yellow precipitate confirms the presence of Lead ion.
K. Wash the precipitate with 10 drops of cold water
L. White or gray precipitate confirms the presence of mercurous ions.
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Step 1: Place 10 drops of the solution to be analyzed in a test tube.
Step 2: Add 4 gtts of K^2CrO^4 into the centrifugate.
This will help in the formation of a precipitate.
Final Answer
1. Place 10 drops of the solution to be analyzed in a test tube. 2. Add 4 gtts of K^2CrO^4 into the centrifugate. 3. Dissolve the precipitate in 2 drops of concentrated nitric acid. 4. Add 6 - 7 drops of water and heat. 5. Keep the mixture hot in a steam bath. 6. Test for the completeness of precipitation. 7. Add 1 - 2 drops of SnCl^2. 8. Instill 10 drops of 3F Ammonia. 9. Yellow precipitate confirms the presence of Lead ion. 10. Wash the precipitate with 10 drops of cold water. 11. White or gray precipitate confirms the presence of mercurous ions.
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