Read the following chemical equation. Cl2 (g) + K+ Br− → K+ Cl− + Br2 (g)

What most likely happens during this reaction?

Potassium loses an electron.
Potassium gains an electron.
Bromine loses an electron.
Bromine gains an electron.

bromine loses an electron

Explanation:

On the right hand side, you can see that  Br became oxidized (  postive because it lost an electron resulting in more protons (+) than electrons (-)). You can see that the charge of K did not change at all. Cl2 become reduced (it gained an electron giving it a more negative charge.)

the answer

explanation:

the capillary tube was too close to the bottom of the beaker.

the ruler may have moved.

water got into the capillary tube.

the temperature was not allowed to equilibrate in the 2-4 minutes.

your picture is not part of the scientific method.