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Pure Substance or Mixture Solutions Separating Solutions Saturation and Changing Properties Hodge Podge Saturation Pure or Solutions Separating and Hodge Mixture Solutions Changing Podge Vocab Properties $10 $10 $10 $10 $10 $10 0 0 0 0 0 0 $20 $20 $20 $20 $20 $20 0 0 0 0 0 0 $30 $30 $30 $30 $30 $30 0 0 0 0 0 0 $40 $40 $40 $40 $40 $40 Which of the following is a pure substance: sodium chloride or steel? Sodium Chloride Which of the following is a pure substance: copper sulfate solution, or copper carbonate? Copper Carbonate Which of the following is a pure substance: copper sulfate or milk? Copper Sulfate Tell how you can examine a substance to determine if it is pure or not. Add water and filter it Water is an example of this part of a solution. Water is a solvent. If you make a solution with orange crystals and water, the orange crystals are WHAT in the solution? The orange crystal is the solute. If you mix 5 g of salt in 20 mL of water, what will the MASS of the solution be? The mass will be 25 g (20 mL of water = 20 g) How does a solution compare to a mixture? A solution is a type of mixture - it is REALLY well mixed (homogeneous) When you pour a solution through a filter, what passes through the filter? Filtrate (the entire solution goes through) When you pour a mixture with soluble and insoluble substances into a filter, what DOES NOT get through? The INSOLUBLE substance What is the substance that gets trapped on filter paper called? Residue/Insoluble How can you get the solute out of a solution? Evaporation How can you tell if a solution is saturated? You can see grains of solute in the solution. If you start with copper sulfate and container that have a mass of 29.8 g, add copper sulfate to water until it is saturated, and find the new mass of the copper sulfate and container to be 22.1 g, how much copper sulfate was added? 7.7 g of copper sulfate When salt is added to ice, what happens to the melting and freezing point of ice? The melting point and freezing point (which are the same things) of the ice goes down. What would you expect the temperature of boiling salt water to be: 98ºC, 100ºC, 102ºC? 102ºC (adding salt raises the boiling point) When salt water is boiling, which of the following is happening: Water is evaporating, Water is dissolving, Water is disappearing, or Water is drying? Water is evaporating Look at the chromatogram. Which of the solutions was not soluble in water? #3 - it doesn’t spread, so it isn’t soluble. Which of the solutions in the chromatogram have the same solute in them? 2 and 4 are the only ones you can tell just by looking (their bottom solutes line up). Describe what happened in a test tube where big red crystals were mixed with water and the result was a red, transparent liquid with a few red grains on the bottom. The red crystals DISSOLVED in the water (it was a solute, the water was a solvent). The solution became saturated so the last red grains didn’t dissolve. The crystals are more dense than water! What is one thing that ALLOYS all have in common? They are mixtures with at least one of the substances being metal. Would a solution be considered heterogeneous or homogeneous? Homogeneous (really well mixed, same throughout!) The picture that shows up on a piece of chromatography paper is called… Chromatogram. The substance that moves the farthest on paper chromatography is the one that has what property? It is the most soluble. What is an example of an alloy? Steel, brass, etc Final Jeopardy Question: Describe what happens when you add water to a stain of marker. Use SCIENTIFIC VOCABULARY! Water is a solvent, and marker is a solute that can be dissolved by water. And the winner is…..
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