Balancing Chemical Equations
What must be the same on both sides of a balanced chemical equation?
The number of each type of atom.
Do acids taste sour or bitter? One attempt
sour
Do bases feel slippery or rough?
slippery
What two types of substances react in a neutralization reaction?
An acid and a base.
What gas do plants produce during photosynthesis?
Oxygen.
What do we change when balancing an equation: subscripts or coefficients? One attempt
coefficients
What ion do acids release in water?
H⁺ (hydrogen ion).
What ion do bases release in water?
OH⁻ (hydroxide ion).
Neutralization typically produces water and what other substance?
A salt.
What is the only planet in our solar system known to support life?
Earth.
True or False: You can change subscripts to balance an equation.
False
True or False: Vinegar is a common acid
True
True or False: Bases taste salty.
False (they taste bitter).
True or False: Neutralization always makes the solution pH exactly 7.
False (often close, but not always).
True or False: Your bones are stronger than steel of the same size.
True.
In the unbalanced equation
H₂ + O₂ → H₂O
which atom is unbalanced?
Oxygen
On the pH scale, are acids below 7 or above 7?
below 7
On the pH scale, are bases above 7 or below 7?
above 7
What are the products of this reaction?
HCl + NaOH → ?
NaCl + H₂O.
What is the fastest-moving animal on Earth?
The peregrine falcon (dives over 200 mph).
What is the correct coefficient for O₂ in the balanced equation:
2H₂ + O₂ → 2H₂O ?
1
What is the name of an acid that contains hydrogen and chlorine?
Hydrochloric acid.
What is the name of a strong base found in drain cleaner?
Sodium hydroxide.
What is the term for the point where an acid and base completely react with each other?
The equivalence point.
What is the only metal that is liquid at room temperature?
Mercury.