Question Video: Identifying Which Statement Regarding the Gravity Filtration of a Sand and Water Mixture Is Correct | Nagwa Question Video: Identifying Which Statement Regarding the Gravity Filtration of a Sand and Water Mixture Is Correct | Nagwa

Question Video: Identifying Which Statement Regarding the Gravity Filtration of a Sand and Water Mixture Is Correct Chemistry • First Year of Secondary School

A mixture of sand and water is filtered in a chemistry laboratory using gravity filtration. Which of the following statements correctly describes the results of this procedure? [A] The sand, known as the residue, is left in the filter paper. [B] The water, known as the residue, passes into the Erlenmeyer flask. [C] The water, known as the residue, is left in the filter paper. [D] The sand, known as the filtrate, is left in the filter paper. [E] The sand, known as the residue, passes into the Erlenmeyer flask.

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Video Transcript

A mixture of sand and water is filtered in a chemistry laboratory using gravity filtration. Which of the following statements correctly describes the results of this procedure? (A) The sand, known as the residue, is left in the filter paper. (B) The water, known as the residue, passes into the Erlenmeyer flask. (C) The water, known as the residue, is left in the filter paper. (D) The sand, known as the filtrate, is left in the filter paper. Or (E) the sand, known as the residue, passes into the Erlenmeyer flask.

In this question, we are told that a mixture of sand and water is filtered using gravity filtration. Gravity filtration is a separation technique that is ideal for separating a mixture containing an insoluble solid and a liquid. To perform gravity filtration, a piece of filter paper is placed inside of a funnel, which is held above an Erlenmeyer or conical flask. The mixture is then poured into the filter paper. Liquid molecules and dissolved ions are very small and can pass through the filter paper. The part of the mixture that passes through the filter paper is known as the filtrate. Large solid particles, however, cannot pass through the filter paper. The part of the mixture that cannot pass through the filter paper is known as the residue.

Now let’s consider a mixture of sand and water. The sand will not be able to pass through the filter paper and will be the residue, while the water can easily pass into the Erlenmeyer flask and is the filtrate. Now let’s take a look at the answer choices. We can eliminate answer choices (B), (C), and (D) because these answers incorrectly identify water as the residue and sand as the filtrate. Of the remaining answer choices, we can identify (A) as the correct answer, as sand, the residue, is left in the filter paper during gravity filtration.

So the statement that correctly describes the results of the gravity filtration of a sand–water mixture is statement (A). The sand, known as the residue, is left in the filter paper.

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