Selecting from filter paper, beaker & evaporating dish, how & in what order, could one separate samples of sand & saltObtained from a mixture of seawater & sand? A) 1 than 3, B) 1...

Selecting from filter paper, beaker & evaporating dish, how & in what order, could one separate samples of sand & salt

Obtained from a mixture of seawater & sand? A) 1 than 3, B) 1 than 2, C) 3 than 1, D) 2 than 1?

Asked on by arman7763

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ndnordic's profile pic

ndnordic | High School Teacher | (Level 2) Associate Educator

Posted on

To efficiently separate salt and sand you would first put the sand and salt in the beaker and add water to dissolve the salt.  Once the salt is dissolved you would pour the mixture of sand and salt water through the filter paper to separate the solid sand from the salt water solution.  You can then put the sand on a dish or paper and let it dry by evaporation.  To recover the pure salt, put the salt water mixture on the evaporating dish and let the water evaporate, leaving the salt behind.  To speed up the process you could heat the salt solution to increase the evaporation rate of the water and get the dry salt crystals quicker.

trophyhunter1's profile pic

trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

Posted on

In the beaker, which contains the seawater and sand mixture, you could remove the sand by pouring everything through filter paper. The sand would be trapped by the filter paper and the seawater would pass through easily. Next, in order to separate the salt from the water, one could simply place the seawater in the evaporating dish and boil it. At 100 degrees Celsius, only pure water vapor will evaporate. Salt will not change states at this temperature and thus remains behind. Eventually, the salt will crystallize.

william1941's profile pic

william1941 | College Teacher | (Level 3) Valedictorian

Posted on

To obtain separate samples of sand and salt from a mixture of seawater and salt you can first use the filter paper followed by the evaporating dish.

The process would start with passing the mixture through the filter paper. Here the sand is trapped by the filter paper and only sea water which has salt dissolved in it passes through. The sea water is then collected in the evaporating dish and heated to above 100 degrees Celsius. At this temperature the water changes to vapor and leaves, and we are left with pure salt.

 

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