Mass, Density, and Volume
What is the tool for measuring mass, and the unit?
triple beam balance, grams
List 3 physical properties of matter
solubility, color, shape, taste, feel, texture, density, state of matter, freezing point, etc
List 3 ways to physical change a piece of paper
cut, rip, tear, color, crumple, get it wet
H2O + CO2 + sunlight --> O2 + C6H12O6
identify the reactants and products
Reactants: H2O , O2 , sunlight
Products: O2 , C6H12O6
I want to make a vinegar and baking soda volcano. I have baking soda, and 50 mL of three different clear liquids. I conduct an experiment to combine each clear liquid with baking soda to see which one reacts, and is vinegar.
What is my independent variable?
the clear liquids (I am changing that)
What is the tool and unit for measuring volume?
graduated cylinder, mL
List 3 chemical properties of matter
flammabitily, combustibility, ability to react, acidity or basicity
List 3 ways to chemically change a piece of paper
Blow it up, light it on fire, pour acid on it
In an exothermic reaction, it feels ____________. In an endothermic reaction, it feels ______________.
word bank: cold, hot
exothermic: feels hot
endothermic: feels cold
I want to make a vinegar and baking soda volcano. I have baking soda, and 50mL of three different clear liquids. I conduct an experiment to combine each clear liquid with baking soda to see which one reacts, and is vinegar.
What is my dependent variable?
whether or not there is a reaction (the result)
My mass is 50g, my volume is 10 mL. What is my density?
50 / 10 = 5g/mL
How do you know that color is a physical property?
I can observe it without changing the object.
How can you tell if an object is just physically changed?
No new substance is formed- its still the same thing
Na is a metal. Cl is a nonmetal. What kind of bond is formed, and what happens to the electrons?
ionic bond, electrons are transferred
I want to make a vinegar and baking soda volcano. I have baking soda, and 50mL of three different clear liquids. I conduct an experiment to combine each clear liquid with baking soda to see which one reacts, and is vinegar.
What is my constant?
50mL of each liquid (stays the same each time)
My mass is 100g, my density is 10 g/mL. What is my volume?
100 / x = 10. 100 = 10x. 100/10 = x.
10 mL
How can you tell if an object is chemically changed (evidence of a reaction)?
A new substance is produced (smoke, light, fizz, bubbles, heat, color change, precipitate)
H is a nonmetal. O is a nonmetal. What kind of bond is formed, and what happens to the electrons?
covalent bond, electrons are shared
I want to make a vinegar and baking soda volcano. I have 20g of baking soda, and 50g of vinegar. Will I have less than 70g, 70g, or more than 70g of my product after I combine my reactants?
equal to! 20 + 50 = 70
x / 25 = 2. x = 25 x 2.
50g
Is solubility (like dissolving sugar or salt in water) a physical or chemical property? How do you know?
Is a state change (melting, freezing, boiling) a chemical or physical change? How do you know?
Physical change- if I boil water, I just have water vapor. It is still the same thing! No new substance was produced
___Na + ___Cl2 --> ____NaCl
Balance the chemical equation
2 Na + 1 Cl2 --> 2 NaCl
What does the law of conservation of matter state?
Matter cannot be created or destroyed