Friday, March 21, 2014

Science-dissolving

For part of our "More about Dissolving" Topic, we suggested ways to try to separate a mixture of flour and water Last week we found we could separate a solution of salt and water by evaporation.The same did not work for our flour and water mixture.
Pouring the water off and then spooning the flour out was a suggestion by Ben.We tried it-not very effective-but we did separate some of the mixture.


Next idea Andrew suggested we use a sieve. He  found the most suitable sieve and tried to separate the mixture-better than the first idea-some flour was left behind in the sieve but some went through as the water was still very cloudy.


Sophie suggested filtering .Georgie suggested using some material to act as a filter.We  found some filter papers in the science box tried it . We saw that the mixture dripped slowly through the filter so we left it over night.


tipping slowly so we did not go over the top of the filter paper

the clear jar showed us that the water was clear when it dripped through

The next morning the water was in the jar-clear without flour in it and the flour was left behind in the filter paper. Success- we predicted, tried and found the best way to separate our flour and water mixture.

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