Saturday, February 9, 2019
lab on solutions :: essays research papers
I IntroductionA. Purpose The purpose of this investigate was to determine if the temperature of urine effects the rate at which brininess dissolves.B. scheme If the temperature of the water increases then the rate at which the salt dissolves will increase.C. learning Concepts Solution- one substance fade away in anotherSolute- the substance that gets change stateSolvent- the substance that the solute gets dissolved inCharacteristic property- a property that is unusual to a substance, does not change depending on the amount of a substance, and contri howevere identify the substancePhysical change- when a substance changes physically but is not chemically effectedSolubility- the amount of a substance that give notice be dissolved in a given amount outcome at a given temperature In the try the solubility of salt was tested in different temperatures of water. The solute was the salt and the consequence was the water. The salt dissolved in the water to form a solution. When the salt dissolved a physical change took place. Solubility along with melting point, freezing point, and stringency is a characteristic property.II Procedure 1. massing cups and a triple commit balance were used to measure 0.5 grams of salt2. 100 ml of nippy water was measured and poured into a beaker utilise a graduated cylinder3. the temperature of the water was measured and enter on a data give in4. the salt was poured into the water and the stop watch was started5. the water was stirred as the salt crystals dissolved6. the number of seconds it took for the salt to dissolve was measured and recorded on a data table7. the experiment was repeated using room temperature and warm water8. each group did one trialIII Results/ConclusionsA. Experimental Data The results of the experiment indicate that the warmer the solvent was the faster the solute dissolved. When the water was 9C it took 51.66 seconds to dissolve. When the water was 57C it took only 13.15 seconds to dissolve.B . Graphs and Tables see attachedC. Evaluate Prediction/Hypothesis The results of the experiment support the hypothesis. The hypothesis stated that the slat would dissolve faster if the water was heated. The salt in the warmer water dissolved about quaternary times faster than the salt in the cold water.IV elongation and SummeryA. Extension Some causes of experimental error may shoot been how fast the stirrer was stirring. This could have been fixed by having the same soulfulness stirring each time.
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