Question
To produce PURE SALT from ROCK SALT, we need to take it through several processes, including THREE listed here. Which ONE is NOT REQUIRED for this process? Dissolving Filtration Evaporation Distillation
Answer
4.4
(234 Votes)
Daisy
Master · Tutor for 5 years
Answer
Distillation
Explanation
## Step 1:This question requires an understanding of the processes involved in purifying rock salt. Rock salt is a type of salt that is not pure, meaning it contains other minerals and impurities. The goal is to isolate the pure salt from these impurities. ## Step 2:The first process mentioned is dissolving. This is a necessary step because salt is soluble in water. By dissolving the rock salt in water, the salt separates from the impurities that are not soluble.## Step 3:The next process is filtration. After the rock salt has been dissolved in water, the solution contains salt and water, along with the undissolved impurities. Filtration is used to separate the undissolved impurities from the salt solution. The filter allows the salt solution to pass through while trapping the undissolved impurities.## Step 4:The third process is distillation. This is not a necessary step in the process of producing pure salt from rock salt. Distillation is a process used to separate mixtures based on differences in their boiling points. In the case of a salt solution, distillation would be used to separate the water from the salt. However, there is a simpler method to achieve this separation, which is the fourth process mentioned, evaporation.## Step 5:Evaporation is a process where the water in the salt solution is allowed to evaporate, leaving behind the pure salt. This process is simpler and more energy-efficient than distillation for separating salt from water.