What happens in confirmatory test for bismuth?
What happens in confirmatory test for copper?
What happens in confirmatory test for arsenic?
Please help! an you explain in detail. even a link explaining it would help
Different procedures/texts use different confirmatory tests. What test/s did you use for each?
Sure! I'm happy to help explain the confirmatory tests for bismuth, copper, and arsenic.
1. Confirmatory test for bismuth:
In the confirmatory test for bismuth, you can use the Gutzeit test. Here is how you can perform it:
- Take a small amount of the sample that may contain bismuth and mix it with a few drops of hydrochloric acid (HCl) to create a solution.
- Add a strip of filter paper impregnated with sulfur (S) to the solution.
- Place a small piece of zinc (Zn) or aluminum (Al) on the filter paper and close the container.
- If bismuth is present, it will react with the HCl to form bismuth chloride (BiCl3), hydrogen gas (H2), and sulfur (S). The sulfur will react with the zinc or aluminum to produce a black coloration of bismuth sulfide (Bi2S3) on the filter paper.
2. Confirmatory test for copper:
To confirm the presence of copper, you can perform the copper flame test. Here are the steps:
- Take a small amount of the sample suspected to contain copper and heat it strongly in a Bunsen burner flame.
- Observe the color of the flame. Copper ions (Cu+) present in the sample will produce a bluish-green flame.
3. Confirmatory test for arsenic:
The Marsh test is commonly used for the confirmation of arsenic. Here's how it works:
- Prepare a Marsh test apparatus, which consists of a generating flask, a delivery tube, and a test tube filled with diluted hydrochloric acid (HCl).
- Add the sample suspected to contain arsenic into the generating flask with zinc (Zn) and hydrochloric acid.
- As the mixture reacts, arsenic gas (AsH3) is produced, which is a poisonous and toxic gas.
- Pass the generated arsenic gas into the test tube containing a glass slide coated with a solution of silver nitrate (AgNO3).
- If arsenic is present, a black or dark brown precipitate of silver arsenide (Ag3As) will form on the glass slide.
In terms of additional resources, here are a few links that provide more detailed information about these confirmatory tests:
- Confirmatory tests for bismuth: [link to be provided]
- Confirmatory tests for copper: [link to be provided]
- Confirmatory tests for arsenic: [link to be provided]
Please note that it's always important to handle chemicals and toxic substances with caution and follow proper safety procedures while conducting any tests.