A
What is the chemical formula for sodium carbonate?
Na₂CO₃
What is the chemical formula for magnesium phosphate?
Mg₃(PO₄)₂
What is the chemical formula for calcium chromate?
CaCrO₄
What is the correct name for NH₄Br?
ammonium bromide
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Yes you did! 500 points!
What is the correct name for Li₂CO₃?
lithium carbonate
Which one is an empirical formula? P2O5 or C6H18O3
P2O5
Which substances in the following equation can Gay-Lussac's law be used? N₂(s) + 2O₂(g) = 2NO₂(g)
O₂(g) and NO₂(g)
Which is the acid in this equation? HBr + NaOH = NaBr + H₂O
HBr
Give the balanced equation for the reaction that occurs between sulfuric acid, H₂SO₄, and calcium hydroxide, Ca(OH)₂.
H₂SO₄ + Ca(OH)₂ = CaSO₄ + 2H₂O
Write the equation that occurs between C₂H₄O₂ and NH₃.
C₂H₄O₂ + NH₃ = C₂H₃O₂⁻ + NH₃⁺
What pH is considered neutral? acidic? basic?
Acidic pH<7, Neutral pH=7, Basic pH>7
Define ionization constant.
The ionization constant tells how likely the ions of a compound will break apart from each other.
Which acid has the highest ionization constant? Solution X has a pH=4 and Solution Y has a pH=3.
Solution Y
When one molecule of Ca₃(PO₄)₂ dissolves in water, how many of each ion are present?
3 ions of calcium and 2 ions of phosphate
Name two things that would increase the solubility of a solid in a liquid.
increase the temperature and the surface area.
Which compound will ionize into the greatest number of ions? CaSO₄ or Ca(NO₃)₂
Ca(NO₃)₂
Name two things that will increase the solubility of a gas in a liquid.
Decrease the temperature and increase the pressure.
What are the properties of an ideal gas?
1. particles must be small, 2. far apart, 3. all collisions are elastic.
Under what conditions do gases behave ideally?
high temperature (greater than 273 K) AND low pressure (less than 1.00 atm)
Is it possible for a reaction to occur if it results in an decrease in entropy?
yes