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Matter
Mixtures and Solutions
| Question | Answer |
|---|---|
| What happened to the salt when you put it in the water? | It dissolves |
| What happen to the level of the water when you add a solute? | The water level rises |
| How do you know when no more salt will dissolve in the water? | Undissolved salt will settle at the bottom |
| Is undissolved salt at the bottom a part of a solution? | No |
| What is the solution called when there is undissolved salt at the bottom of a cup? | A saturated solution |
| How can you find out if Epsom salts dissolves in water to make a solution? | Put it in water to see if it disappears and the solution becomes transparent |
| How can you find out how much Epsom salts is needed to saturate 50 mL of water? | Follow the same procedures used to determine salt saturation |
| Which is more soluble? Kosher salt or Epsom salt? | Epsom Salts |
| What was the mystery substance on ISN page 77? | Citric Acid |
| How did you come to that conclusion that the mystery substance was citric acid ? | Conducted an investigation, then compared the results to the Solubility Table on page 77 of the ISN |
| Which of the three (Kosher salt, Epsom salt, Citric acid) is most and less soluble? | Citric acid is most soluble; Kosher salt is least soluble |
| Is a soft-drink a mixture or a solution? | Both, it is a mixture because it can be separated; it is a solution because it is transparent, and the solute is evenly distributed in the solvent |
| What is a solvent? | Liquid |
| What is a solute? | Solid (Soft-Drink powder) |
| How could you test to confirm it is a solution? | Filter it; check to see if it is transparent |
| How do you make a concentrated soft-drink solution? | More powder (solute), less water (solvent) |
| How do you make a dilute soft-drink solution? | Less powder (solute), more water (solvent) |
| How can you tell if a soft-drink solutions is more concentrated? | Taste, color |
| Solution A contains 1 spoon of salt and 50 mL of water; Solution B contains 3 spoons of salt and 50 mL of water. Which solution is more concentrated? | Solution B |
| Solution X contains 2 spoons of salt and 50 mL of water; Solution Y contains 4 spoons of salt and 50 mL of water. Solution Z contains 6 spoons of salt and 150 mL of water. Which two solutions are the same? | Solution X and Z |
| Solution X contains 2 spoons of salt and 50 mL of water; Solution Y contains 4 spoons of salt and 50 mL of water. Solution Z contains 6 spoons of salt and 150 mL of water. Which solution is the more dense? | Solution Y |
| A mass piece is placed in each of two cups marked A and B. The mass piece sinks in cup A. The mass piece floats in cup B. Is the mass piece more dense or less dense than liquid A? | More Dense |
| A mass piece is placed in each of two cups marked A and B. The mass piece sinks in cup A. The mass piece floats in cup B. Is the mass piece more dense or less dense than liquid B? | Less Dense |
| A mass piece is placed in each of two cups marked A and B. The mass piece sinks in cup A. The mass piece floats in cup B. Is liquid A more dense or less dense than liquid B? | Liquid A is less dense |
| A mass piece is placed in each of two cups marked A and B. The mass piece sinks in cup A. The mass piece floats in cup B. Will Liquid A float on Liquid B, or will Liquid B float on Liquid A? | Liquid A will float on Liquid B because the more dense liquid will always sink to the bottom and the less dense liquid will always float on the top |
| Which mixture from making and separating mixtures and solutions, were you able to separate with a filter? | Only the powder and water |
| How were you able to separate the salt from the mixture? | Evaporation |
| How are a screen and a paper filter similar? How are they different? | Both separate materials; but the filter paper has much smaller holes |
| What happened when the saltwater solution evaporated? | Solid salt was left in the dish |
| Did the salt look the same as it originally did before evaporation? | No, it looks like crystals |
| What does a salt crystal look like under a microscope? | It is square with an X from corner to corner |
| What item were you able to separate using the magnet? | Magnetite (a mineral; iron ore) |
| What method allowed complete separation of the dry mixture of gravel, powder, salt, and magnetite? | 1st use the magnet- magnetite; 2nd add water; 3rd -screen to separate the gravel; 4th- filter to separate the powder; 5th evaporate the water leaving salt crystals. |
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