Chemical Formula
What is the charge on a sodium ion (Na⁺)?
1 +
Define a combustion reaction.
Reaction with Oxygen that produces energy.
What is the pH range of acids?
0-14
What gas is produced in combustion reactions?
Carbon dioxide
What is the formula for oxygen gas?
O2
What is the charge on a chloride ion (Cl⁻)?
1 -
What are the reactants in this equation:
CH4 + O2 → CO2 + H2O?
CH4 + O2
What is the name of an indicator?
Litmus paper
Universal indicator
What gas does the squeaky pop test for?
Hydrogen
Write the formula for a molecule with 2 hydrogen atoms and 1 oxygen atom.
H2O
Which element has the chemical symbol "K"?
Potassium
What is the difference between an endothermic and exothermic reaction?
Exothermic release energy
Endothermic absorbs energy
What does pH 7 mean?
Neutral
What happens when magnesium reacts with an acid?
A reaction. Magnesium and acid becomes a magnesium salt and hydrogen.
True or False: H2 + O2 → H2O is balanced.
False
2H2 + O2 → 2H2O
Write the formula for sodium chloride.
NaCl
Write the state symbols for water as a liquid, solid, and gas.
H2O (l)
H2O (s)
H2O (g)
Name three everyday items that contain acids.
Lemon
Vinegar
Batteries
Write the formula for hydrochloric acid.
HCl
Create the formula for an ionic compound formed between iron(III) ions (Fe³⁺) and hydroxide ions (OH⁻)
Fe(OH)3
Write the formula for a compound formed between aluminum ions (Al³⁺) and sulfate ions (SO₄²⁻).
Al2(SO4)3
Write a word equation for a neutralization reaction.
Acid + Alkali ---> Salt + Water
What is the difference between an alkali and a base?
Alkali's are bases that are soluble in water. A base can be insoluble and soluble.
Why does limewater turn cloudy?
Explain why carbon monoxide (CO) is harmful.
Toxic and poisonous. Reduces the ability of the blood to carry oxygen.