Chemical Mathletes
The limiting reactant in a chemical reaction is..
What is the one consumed completely!
A species that is dissolved in a solution, but does not take part in the chemical reaction, is called a...
What is a Spectator Ion!!
This point in a titration curve occurs when moles of acid equal moles of base.
What is the equivalence point?
In the following reaction, this is the reducing agent:
2Al+3Cu2+ --> 2Al3++3Cu
What is Aluminum?
This type of change occurs when a substance undergoes a phase transition, like melting or boiling, without forming a new substance.
What is a physical change?
Al2(CO3)3 -->Al2O3 + 3CO2
If 9.66 Moles of CO2 is produced, how many moles of Al2(CO3)3 were there to start?
What is 3.22 mols!
Write the balanced molecular equation then right the ionic equation
Mg + HCl --> MgCl2 + H2
What is Mg(s) + 2H+(aq) --> Mg2+(aq) + H2(g)!
This piece of glassware is used to deliver a precise volume of titrant during a titration.
What is a burette?
This term describes the process in which a substance loses electrons during a chemical reaction.
What is oxidation?
Burning magnesium ribbon in air is an example of this type of change, resulting in the formation of magnesium oxide.
What is a chemical change?
Al2(CO3)3 -->Al2O3 + 3CO2
If 85.96g of Al2(CO3)3 decomposes, how many grams of CO2 will be given off?
What is 48.49g!
The reaction between sulfuric acid and potassium hydroxide is shown below H2SO4(aq)+2KOH(aq) --> K2SO4(aq)+2H2O(l).
What is the the net ionic equation?
What is H+(aq) + OH- --> 2H2O(l)!!
During a titration of a weak acid with a strong base, the pH at the equivalence point is greater than this number.
What is 7?
In a basic solution, this is the balanced equation for the reaction between Cr(OH)3 and ClO− to form CrO42- and Cl–?
What is 2Cr(OH)3+3ClO−+4OH− -->2CrO42−+3Cl−+5H2O?
During a chemical change, at least one of these is formed, indicating a new arrangement of atoms.
What is a new product?
A 0.204 gram sample of a metal, M, reacts completely with sulfuric acid according to:
M + H2SO4 ---> MSO4 + H2
A volume of 213 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 torr, and the temperature is 25.0 °C. Calculate the molar mass of the metal.
What is molar mass is 24.03 (Magnesium)
The reaction between calcium hydroxide and Iron (III) chloride is: 3Ca(OH)2(aq)+2FeCl3(aq) --> 3CaCl2(aq)+2Fe(OH)3(s).
What are the spectator ions?
What is Ca2+ and Cl-!!
This is the most prominent species at the half-equivalence point in a titration of a weak base with a strong acid.
What is the conjugate acid?
In a redox reaction, this must happen to the oxidation number of an element that is being oxidized
What is it decreases (or goes down)?
Dissolving an Ionic compound is this type of change.
What is a physical change?
C6H12O6(s) + 6 O2(g) --> 6 CO2(g) + 6 H2O(l)
The human body needs at least 1.03 x 10-2 mol O2 every minute. If all of this oxygen is used for the cellular respiration reaction that breaks down glucose, how many grams of glucose does the human body consume each minute?
What is 0.309g!!
Write the net ionic equation for the reaction that takes place between aluminum and copper (II) chloride.
What is 2Al(s)+3Cu2+(aq) --> 2Al3+(aq)+3Cu(s)!!
This formula is used to calculate pH during a buffer region of a titration involving a weak acid and strong base, and has the equation pH = pKₐ + log([A⁻]/[HA]).
What is the Henderson-Hasselbalch equation?
Identify the oxidizing agent in the reaction: Zn + Cu²⁺ --> Zn²⁺ + Cu.
What is Cu²⁺?
Name two observable signs that typically indicate a chemical change has occurred.
What are color change, gas production, temperature change, precipitate formation, or odor change? (Only two are needed to win)