Question

Your lab group added a small amount of chromium chloride (CrCI2) to a test tube of sodium hydroxide (NaOH). At first nothing happened in the test tube, but after a few seconds a white cloudiness appeared. after 3 minuets, the test tube was full of a white substance. Did a chemical reaction take place, yes or no? What evidence or lack of evidence do you have to support your answer?

Answer 1

A chemical reaction occurred between chromium chloride and sodium hydroxide as evidenced by the formation of a white precipitate, likely chromium hydroxide, in the test tube.

Step-by-step explanation:

Yes, a chemical reaction took place when chromium chloride (CrCl2) was added to sodium hydroxide (NaOH). The evidence supporting this conclusion is the formation of a white cloudiness that eventually filled the test tube with a white substance.

This observation indicates the formation of a precipitate, which is a solid that forms from a solution during a chemical reaction. The white precipitate is likely chromium hydroxide [Cr(OH)2], which is produced when chromium ions from chromium chloride react with hydroxide ions from sodium hydroxide.