Chemical Reactions
The smallest building block of matter
Atom
What is matter?
anything that has mass and takes up space
What gas did we figure out was coming out of the bath bombs?
Carbon Dioxide
What do you call the substances that are mixed to create a chemical rxn?
Reactants
Why are experiments important?
Experiments help us gain the evidence to support or refute our initial ideas/claims we once had/predictions.
Two or more atoms combine and form a bond, they create a
Molecule
What is mass?
the amount of particles in an object of substance
What were two forms of energy we added to water in our last experiment?
heat and electricity
What do you call the NEW substances that a chemical rxn creates?
Products
What did we do to figure out the combination of substances that react in the bath bomb? What was the combination?
2 experiments
We added each individual ingredient to water and found that none of them reacted alone.
We added each individual ingredient to each of the other substances and found that when you add citric acid and baking soda to water a reaction occurs.
A single type of atom is
An element
What is the law of conservation of mass?
matter cannot be created or destroyed only rearranged to form new substances
How many Hydrogen (H) atoms are there in this molecule, how many Oxygen (O) atoms are in this molecule?
3H2O
6, 3
What do you call a change in a substance that only alters its appearance not its chemical composition?
A physical change
When performing an experiment, what should you use to collect qualitative and quantitative evidence?
A data table, a graph, a note chart
Atoms attract other atoms based on their
Charge (negative, positive, or no charge)
What two things happen during a chemical reaction
The molecules break apart and rearrange to form the new substances produced.
When a chemical reaction happens what should the reaction start and end with?
The same number and type of atoms
What do you call a change in a substance that alters its chemical composition and properties?
A chemical reaction
James has an orange powder and 5 different liquids. He wants to know if the orange powder is reactive. What should he do? If the orange powder is reactive how will he know?
James should add a little bit of the orange powder to each of the 5 liquids to see if it will react. He would see signs of a chemical reaction like bubbling, fizzing, and explosion.
Name the two types of molecules we have talked about in class.
Elemental and Compound
What is the difference between a physical change and a chemical reaction?
Chemical reactions are irreversible and cause the chemical composition of the original substances to be altered forever (creates new substance w/ new properties)
A physical change only alters the appearance of the matter without changing its chemical composition.When NaHCO3 and Ni3K4Fe react, it can produce NH4NO3 True or false. Must explain
The reactants do not contain A N atom. If there are no Nitrogen atoms to begin with, you cannot create a product with Nitrogen (N) atoms.
Which of the following molecules can we make from this equation? 3NaCHO3 + C6H8O7 + 3H2O
1. Na3C6H5O7
2. 7H2Ni2
3. CO2
4. H2O2
1. Na3C6H5O7
3. CO2
4. H2O2
Cindy, is curious about a white powder she saw on Tikok. Fact or Cap said that the substance is reactive and it checked out. She has three liquids. She adds a bit of the white powder to each of the three liquids individually and nothing happens, but she knows it should react because she has all the right ingredients. What should she do next?
Cindy should try different combinations using the substance and the liquids.
ex. Liquid 1 and Liquid 2 + white substance
ex. Liquid 2 and Liquid 3 + white substance