help PLEASE, I am behind already.

The factors to be kept constant in the experiment are:
The greater the quantity of salt added, the faster the rate of the melting of ice.
The melting of ice when salt is added is due to the lowering of the melting point of ice by the salt.
The rate of the reaction is directly proportional to the concentration or amount of salt added.
Therefore, the greater the quantity of salt added, the faster the rate of the melting of ice.
The factors to be kept constant are:
In conclusion, the rate of melting of ice increases with increase n the quantity of salt added.
Learn more about salt and melting of ice at: https://brainly.com/question/17118985
#SPJ1