Chemical Bonding
What type of bond occurs between a metal & a non-metal?
Ionic Bond
What is the product in a reaction?
The end things
Does an exothermic reaction produce or absorb heat?
Explain why equations must be balanced.
Conservation of Mass
What is the independent variable?
What you change
Which bond is described as having a "sea of electrons"
Metallic bonds
In a word equation, where are reactants written?
At the start (Left)
What type of reaction happens when you pour Hydrochloric acid onto Iron metal
acid + metal
How many Hydrogen atoms total in this compund:
5CH3
15
dentify the independent variable: “Measuring how temperature affects reaction rate.”
→ Temperature
Non-Metal & Non-Metals bond how?
By sharing electrons
Identify the reactants in:
acid + carbonate → salt + water + carbon dioxide
Acid & Carbonate
Water + Salt
Balance: H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
Why is a graph useful?
t helps identify patterns and trends
Name two properties of an Covalent bond?
- low melting point
-doesn't conduct electricity
- strong
What does the chemical equation tell us
What gas is produced if I combine Acetic Acid with Calcium Carbonate
Carbon Dioxide
Balance this
Mg + HCl → MgCl₂ + H₂
Mg + 2HCl → MgCl₂ + H₂
What type of graph is best for categories (e.g. before vs after)?
A bar graph
Explain how sodium (metal) and chlorine (non metal) bonds
Sodium donates 1 electron to chlorine which needs one electron
Explain the difference between a word equation and a chemical equation.
Words are general
Chemical are descriptive
Write the full general equation for an acid- metal reaction
Acid + Metal --> Salt + Hydrogen Gas
Balance
H2SO4 + CaCO3 --> CO2 + H2O + CaSO4
H2SO4 + CaCO3 --> CO2 + H2O + CaSO4
Explain how to improve reliability in an experiment.
Repeat trials, calculate averages, use consistent methods