Mixtures and Solutions Jeopardy Investigation 1 Investigation 2 Investigation 3 Investigation 4 Grab Bag 10 10 10 10 10 20 20 20 20 20 30 30 30 30 30 40 40 40 40 40 50 50 50 50 50 Final Jeopardy Make your wagers! In class, we discussed that the concentration of a solution is also a RATIO (or fraction). Find out which is more concentrated by using fractions. •50ml of water and 2 spoons of salt •100ml water and 4 spoons of salt •150ml of water and 5 spoons of salt Define the word “mixture” What would be the best method for separating pebbles from diatomaceous earth? Which of the following is NOT a mixture? •Water and flour •Water and ice •Sand and dirt What is the word for a special mixture in which one material dissolves into another? What characteristics identify a crystal? What does it mean to be soluble? Joe was making iced tea. He noticed that even though he kept stirring, no more powdered tea mix would dissolve. What happened? Name two ways to dissolve more solute in a saturated solution. Which of the following substances will not make a solution? •Salt and water •Sand and water •Epsom salts and water One spoonful of salt weighs 5g. 50 ml of water weighs 50g. How much does a solution 3 scoops of salt in 50g of water weigh? Define the word “concentration” Name 3 ways you could tell the concentration of a solution. Sarah has a cup with 50ml of water and 10g of salt stirred in. She adds 10ml more of water. The solution is now __________ because it is less concentrated. Which of the following is most concentrated? •50ml of water with 10g salt •50ml of water with 20g salt •50ml of water with 5g salt Why would concentration of ingredients be important when you are cooking? Define the word “change” What is the difference between dissolving and a chemical reaction? Name the 3 signs that a chemical reaction has occurred. What is the difference between a reactant and a product? You scooped 5g of calcium chloride, 5g of citric acid, and 5g of baking soda into a cup. Then you added 50ml of water and the mixture. The mixture fizzed and 30 minutes later a white substance formed. Name the products and reactants. Why is citric acid added to foods? What are some solutes found in air? What is pollution? How many natural elements are known today? What is an alloy and why do we use them?