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mixturessolutioncast
mixsol test
| Question | Answer |
|---|---|
| in a diagram you can see a visible beam of light in the mixture to the right, therefore the mixture must be a | colloid |
| if you leave a glass of salt water on the counter you will eventually have only salt in the glass. This is due to | evaporation |
| The process of distillation will finish with __________ in the beaker at the end | pure water |
| As more salt is added to each solution the boiling point increases above 100 degrees C this is called | boiling point of elevation |
| Two temperatures readings represent the freezing point for each solution. By adding salt to the water the freezing point is lowered below 0 degrees C This is called | Freezing point of depression |
| The sand does not mix with water. The sand is _________ because it does not dissolve i water | insoluble |
| Salt mixes with water, We can say that salt is __________ because it dissolves in water | soluble |
| A temporary _________, like oil and water will not stay mixed for long | emulsion |
| An example of an emulsifying agent is | soap, gelatin, egg yolk, pectin |
| A __________ solution is one in which a large amount of solute is dissolved in a solvent | concentrated |
| A __________ solution is one that has a small amount of solute in the solvent | dilute |
| A solution is a mixture of particles that | are so small they cannot be seen with a microscope, will not settle to the bottom of the container, will remain constantly and uniformly mixed |
| Three ways to change the rate of dissolving include | crushing, stirring and heating |
| a saturated solution is a solution | that contains all of the solute it can hold at a given temperature |
| an unsaturated solution is a solution that | can dissolve more solute at a given temperature |
| A supersaturated solution is a solution | that contains more solute than a saturated solution at the same temperature |
| At minus 25 degrees Celsius water is in the _________phase | solid |
| between 0 degrees C and 100 degrees C water is in the ________phase | liquid |
| above 100 degrees C water is in the _________ phase | gas |
| Salt is used in the winter during snow storms to _______ so it doesn't freeze into ice | lower the freezing point of water below 0 degrees C |
| Salt is added to water when cooking for taste and to _______. you may wait longer but the food will cook more thoroughly | raise the boiling point of water above 100 degrees C |
| Why can't oil dissolve in water? | oil has non polar molecules and water has polar molecules |
| Why is water known as the universal solvent | many substances are able to dissolve into water |
| Two emulsifying agents commonly used to permanently suspend substances are | egg yolk and soap |
| you make a solution of ice tea crystals, salt water and sugar. Which ingredient is the solvent | water |
| Chemical change | a nail rusts |
| physical change | formation of a pothole |
| mixtures like fog or mayonnaise with particles smaller enough that they dont settle out but are large enough to scatter light are known as | colloids |
| A mixture that appears to be a single substance but is made up of a solute dissolved into a solvent is called | solution |
| process used to separate salt and water | distillation |
| using a ring stand funnel filter paper to separate a mixture of gravel salt and water. Which substance will be found in the beaker after filtering | salt and water |
| the substance that dissolves to form a solution is | solute |
| A student wants to get 10 cups of sugar to dissolve into only 2 cups of water. IN order to make this super saturated solution the student must | heat the solution while stirring to spread the water molecules apart so all of the sugar can dissolve |
| in a supersaturated solution lab the evidence that let you know that the saturated solution had become supersaturated was when | the solution cooled and sugar started to crystallize |
| in a solution of lemonade: _____is the solute and_________ is the solvent | lemon - water |
| what is the difference between heterogeneous mixtures and homogeneous mixtures | heterogeneous mixtures are mixtures in which different material can easily be distinguished, they have more than one color. Homogeneous mixtures contain two or more gases , liquid or solid substance and appear to be one color |
| what is the difference between chemical and physical change | chemical change is a change that produces a new substance. Physical change a change that does not produce a new substance |
| What is the difference between polar and non polar molecules | polar molecules one end of the molecule has a positive charge and the other end has a negative charge. Nonpolar molecules the electrical charges aren't separated. They do not have positive and negative ends. |
| what is the difference between solutions and suspensions | solutions: dont scatter light, clear mixture, permanent solution, particles not visible , particles dont separate , mix evenly. Suspension - scattered light , cloudy mixture, heterogeneous, temporary mixture, visible , can separate, do not mix |
| What does adding solute do to the boiling point of a liquid | by adding solute it raises the boiling point 0f liquid solvent this is called boiling point elevation |
| what does adding solute do to the freezing point of a liquid | by adding solute it lowers the freezing point of a liquid b y adding solute this process is called freezing point of water |
| Examples of an emulsifying agent | egg yolk, gelatin, soap, pectin |
| how can you make a temporary emulsion into a permanent emulsion | by the process called homogenization. For example skim milk and cream are homogenized into milk |
Created by:
calane16