Chapter 12 Mixtures & Solutions

Matter cannot be created or destroyed Before we get into this lesson it is important to understand that matter is neither created or destroyed. –Sometimes it might seem as though it has – like when something burns and you observe that there is not much left of the log or paper, etc. –Where did the material go? Use what you know about states of matter to answer –Discuss with shoulder partner (30 sec)

demo What did you observe? What types of matter changed? (s, l, g)

CH3COOH + NaOH >> CH3COONa + H2O

6H 2 O + 6CO 2 C 6 H 12 O 6 + 3O 2 Use the following vocabulary and color code the chemical formula: Molecule atom chemical equation Coefficient Subscript Product reactant What is this the formula for?

Watch this video watch?v=Vt7lN4QPU0khttps:// watch?v=Vt7lN4QPU0k Write down 3 big ideas. Discuss with your group (1 min) Revise your ideas Think of one question you might have regarding mixtures or solutions. _______________________________ _______________________________ _______________________________

MATTER is solid liquid gas melts to freezes to evaporates to condenses to anything that has mass and takes up space can be MATTER FACT Water can be found naturally on earth as a solid, liquid, and a gas.

MIXTURES Two or more kinds of matter put together are solutions separated can be by filtration using sieves using magnets floating vs. sinking evaporation sorting distillation chromatography one kind of material dissolves in another made when cannot be separated by filtration which

MIXTURES visible parts no visible parts can have sand and water oil and vinegar iron and sand SOLUTIONS Kool-Aid ® salt and water are called like

Read pages HeterogeneousHomogeneous

How would you separate a mixture of sand and water?

Lets try to figure out what's in it! In your table teams you will see a beaker with wet sand. As a scientist how might you figure out what this MIXTURE is made of? –Ind – brainstorm ways to separate the components in a mixture (3 min) (can research using internet) –Each person share your results with your team (3 min) –As a team write down three ways you will try to separate the mixture. Write them in order in your procedures pages of the lab report & fill in the materials chart (5 min)

Lets try it! S4 Collect materials and equipment Help set up the lab Recorder Write down amounts of each substance extracted from the mixture Weigh it using the scale

Lets conclude as a class! Write down your measurements in data chartMatch the beaches Which table has sand taken from the same beach as your team? How did you know? SubstanceAmount (g)Notes

How would you separate a mixture of sand and water? POSSIBLE ANSWER: Pour the mixture through a filter. The water will go through the filter leaving the sand behind. POSSIBLE ANSWER: Pour the mixture through a filter. The water will go through the filter leaving the sand behind.

How would you separate a mixture of iron and sand?

How would you separate a mixture of iron and sand? ANSWER: Use a magnet to separate the iron from the sand. ANSWER: Use a magnet to separate the iron from the sand.

How would you separate a mixture of salt and water? HINT: Salt and water form a solution. HINT: Salt and water form a solution.

How would you separate a mixture of salt and water? HINT: Salt and water form a solution. HINT: Salt and water form a solution. ANSWER: Heat the water until the water evaporates. The salt will remain. ANSWER: Heat the water until the water evaporates. The salt will remain.

INVESTIGATING SOLUTIONS 1. What is a saturated solution? _________________________________________ _________________________________________ _________________________________________ 2. How can you tell when a solution is saturated? _________________________________________ _________________________________________ _________________________________________ A solution in which no more solid material will dissolve; additional material settles to the bottom. No more material will dissolve in the solution.

INVESTIGATING SOLUTIONS 3. What is solubility? _______________________________________ _______________________________________ _______________________________________ 4. What is meant by the solubility of a material in water? _______________________________________ _______________________________________ _______________________________________ How much of the material dissolves in the water. Solubility is the property that substances have of dissolving in solvents, such as the solubility of salt in water.

INVESTIGATING SOLUTIONS 5. What is a concentrated solution? _______________________________________ _______________________________________ _______________________________________ 6. What is a dilute solution? _______________________________________ _______________________________________ _______________________________________ A solution containing a small amount of material dissolved in a large amount of liquid. A solution containing a large amount of material dissolved in a measured amount of liquid.

INVESTIGATING SOLUTIONS 7. What is the difference between an acid & a base? _______________________________________ _______________________________________ _______________________________________ 8. What happens when the two are combined? _______________________________________ _______________________________________ _______________________________________ A chemical reaction takes place in which the H+ and OH- combine to form H2O and the solution becomes more balanced or closer to a pH of 7. An acid is a solution with a high _____ concentration and is above a 7 pH. A Base is a solution with a higher___ and is below 7pH.

Which is a saturated solution? A B How do you know?

Which is a saturated solution? A B No more material will dissolve in solution A.

A B How do you know? Which is a concentrated Kool-Aid ® solution?

A B Solution A is darker in color than Solution B.

Note: A and B have the same volume. Which is a dilute saltwater solution? A B 125 g 100 g How do you know?

Which is a dilute saltwater solution? A B 125 g 100 g Solution A has less mass than Solution B.

Write down 5 terms you did not know in the video watch?v=A_URRb5mk5Qhttps:// watch?v=A_URRb5mk5Q Find the definitions of these words. Discuss in table teams the different words your teammates found Now watch the video again Did you understand the video a little better? Discuss in your groups what you learned Now conduct the mini-lab. Write down your observations Using the video and what you observed in the video write a Sum-it-Up explaining pH (acid & basic solutions) What do you think was the base & acid in the H2O & Alka-Seltzer? How did you know?

Student Handouts Fill in iNB

MATTER is can be

MIXTURES are can be by made when which

MIXTURES can have are called like

INVESTIGATING SOLUTIONS 1. What is a saturated solution? ___________________________________________________________________________________ ___________________________________________________________________________________ 2. How can you tell when a solution is saturated? ___________________________________________________________________________________ ___________________________________________________________________________________ 5. What is a concentrated solution? ___________________________________________________________________________________ ___________________________________________________________________________________ 6. What is a dilute solution?___________________________________________________________________________________ 3. What is solubility? ___________________________________________________________________________________ ___________________________________________________________________________________ 4. What is meant by the solubility of a material in water?___________________________________________________________________________________

INVESTIGATING SOLUTIONS 7. What is the difference between an acid & a base? _______________________________________ _______________________________________ _______________________________________ 8. What happens when the two are combined? _______________________________________ _______________________________________ _______________________________________