Sec 2 Science Solutions and Suspensions

The leornlng Lab [ Chemistry Lower Secondary Intensive Practice Elements, Compounds and Mixtures Notes (ll) Solutions and Suspensions ‘ D as. ENC me |.D. Date Day LR___ Teacher s)ll"<l 5910'“)! /"l 31" Cloud 1e can dissolve In a variety of solvents to form solutions of carrying colours. olour me pretty No part of this publication may be reproduced without lhe prior permission of The Learning lab

Procedure (A) - m Notes (ll) 9 Learning Lob Lower Secondary Science lnlensrv'e Practice - Chemlslry — Elements. Compounds and Mixtures (1) Measu_re I New"; (2) Pour Ml j (3) Turn c {4) Colle ’rocer l) D i i L:[’ STUDENT OUTCOMES 1’ At the end of today’s lesson, students should be able to: Differentiate between solutes, solvents and solutions Recogm'sc that solutions and suspensions are mixtures define solutions and suspensions and describe their properties state the similarities and differences between solutions and suspensions define solubility Describe the factors affecting solubility of a solute DDDDDDD Describe the factors affecting the rate of dissolving of a solute Solutions A solution is a homogeneous mixture made up of two or more different substances physically combined together. A solution usually consists of a solvent, the substance used for dissolving, and one or more Usolute ) which are dissolved. For example, in an aqueous solution of sugar, the solvent is water anéthe solutes are the sugar molecules. X— solute (sugar molecules) 9‘ Mano, commemf m SolV‘WVl solvenllwuter) 5~ For a solvent to dissolve a solute, the particles of the solvent must be able to separate the particles of the solute and occupy the spaces in between. I The diagram below shows the arrangement of particles in a solution after the solute is completely dissolved and all the solute particles are evenly distributed throughout the entire solution. The“ can but]! Lg Ct change yam/£2“ Saute and Submit W‘U‘ WMWLII W 0” {ht 3a sr y. Shy ® solvent particle O solute particle When a solute is dissolved, the solute partirles are interspersed between the solvent partirles. No port of this publication may be reproduced without the pn'or permission of The Leornlng Lab

\-Hrr \ .Turn off the flame .ollect residue fo Notes (ll) ning Lab Lower Secondary Science Intensive Practice — Chemistry — Elements. Compounds and Mixtures .‘dure (B) _ Cry, me Lear AW“ Properties of solutions We .r r" Solutions have a homogeneous composition with uniform physical and chemical properties throughout. The colour, density, appearance and other physical and chemical properties are uniform throughout the solution. When a solution is filtered, no residue is left on the filter paper. When a solution is left to stand, the solute does not separate from the solvent. Examples of solutions Solutions can exist in any of the three physical states. Solid solutions "‘ Dental fillings (amalgam) are solutions consisting of mercury, silver, tin, copper and trace amounts of zinc. Ste