What indicates a positive test for the presence of salt?

1 answer:

3 0

The presence of salt that is sodium chloride cannot be tested at once. Two different tests are performed to show the presence of both sodium and chloride.

To test for the chloride ion:

Add few drops of aqueous solution of silver nitrate to aqueous solution of sodium chloride, white precipitate is seen which cannot dissolve in cold water and dilute nitric acid. This precipitate formed is soluble in solution of ammonium hydroxide to give a colorless diamine silver chloride solution.

To test for the sodium ion: Use a flame test.

Dip a wire of platinum in concentrated hydrochloric solution and hold it in the flame of the Bunsen burner until the flame no longer changes its color. Again dip the wire in hydrochloric solution and rub some sodium chloride on the wire and put it again in the burner, an intense yellow to orange color forms that shows the presence of sodium ion.

If the substance passes both the tests in the given way then it is salt (sodium chloride)

You might be interested in

The glands located besides the thyroid are the _____ gland

levacccp [35]

The glands located besides the thyroid are the Parathyroid gland.

3 0

4 years ago

Which cells are responsible for attacking, adhering, engulfing, and digesting foreign bodies?

7nadin3 [17]

Phagocytes are cells that protect the body by ingesting (phagocytosing) harmful foreign particles, bacteria, and dead or dying cells

6 0

3 years ago

Read 2 more answers

(63 points) {brainliest}

katen-ka-za [31]

Answer:

Explanation:

Telomeres are distinctive structures found at the ends of our chromosomes. They consist of the same short DNA sequence repeated over and over again. Telomeres are sections of DNA? found at the ends of each of our chromosomes?. They consist of the same sequence of bases ?repeated over and over.

8 0

3 years ago

Read 2 more answers

Sort each word into the correct category.

MissTica

Answer:

5867856774575

Explanation:

3 0

3 years ago

Construction workers attach ropes and pulleys to wooden timbers on an old bridge.

balu736 [363]

Answer:

It is a safe and efficient method.

Explanation:

This method of dismantle the bridge is also a good one but there are some other methods also that are used instead of rope and pulley system such as destroy the bridge by using bombs at the base of pillars and cutting of each part in order to dismantle the bridge. This rope and pulley system is also an efficient way to dismantle the bridge so that's why the engineers used this method instead of other methods due to its safe method.

5 0

3 years ago