Conceptual
The smallest whole number ratio of atoms in a compound is the ____?
Empirical formula
What is the molecular formula of 29 grams of CHO?
CHO
What is the name of the reactant we don't have enough of (is preventing the reaction from producing more product)?
Limiting reactant
When doing a titration, what does the even pink color represent?
Equivalence point
The actual formula is the _____?
Molecular formula
What is the empirical formula of a compound made with 0.993 grams C, 0.167 grams H, and 0.880 grams O?
C3H6O2
The name of the reactant in excess
How many mL of 0.50 M sodium hydroxide are required to neutralize 15.0 mL of 0.35 M sulfuric acid (H2SO4)?
21 mL
What is the empirical formula of C8H4O12
C2HO3
What is the percent composition of carbon, hydrogen, and oxygen in 23.977 g of an acid that was burned and produced 32.96 g of CO2 and 8.99 g of H2O?
C = 37.52 %
H = 4.196%
O = 58.29 %
Determine the limiting reactant that produces sodium chloride from 8.00 grams of sodium and 8.00 grams of diatomic chlorine.
2Na(s) + Cl2(g) -> 2NaCl
Cl2
What volume of a 0.330 M solution of sodium hydroxide would be required to titrate 15.00 mL of 0.1500M oxalic acid?
C2O4H2(aq) + 2NaOH(aq) -> Na2C2O4(aq) + 2H2O(l)
0.01364 L NaOH
What type of compound is always an empirical formula?
Ionic Compounds
A compound is found to contain 26.56% potassium, 35.41% chromium, and the remainder oxygen. Find the empirical formula.
K2Cr2O7
Determine the limiting reactant when 0.50 mol of Cr and 0.75 mol of H3PO4 react according to the following equation.
2Cr + 2H3PO4 -> 2CrPO4 + 3H2
Cr
Titration of a 20.0 mL sample of acid rain required 1.7 mL of 0.0811 M NaOH to reach the end point. If we assume that the acidity of the rain is due to the presence of sulfuric acid, what was the concentration of sulfuric acid in this sample of rain?
H2SO4(aq) + 2NaOH -> Na2SO4 + 2H2O
0.00344 M H2SO4
What is the molecular formula of a compound weighing 295 grams with an empirical formula of C2H3O2?
C10H15O10
What is the percent composition by mass of aspartame (C14H18N2O5)?
C = 57.13%
H = 6.2%
N = 9.5 %
O= 27.2%
If 7.31 g of solid zinc was mixed with 11.49 mL of 0.255 M tin(II)chloride, can 5.00 g of solid tin be generated? Why or why not? What is limiting the limiting reactant?
No because SnCl2 is limiting and only 0.348 grams Sn can be made.
A solution made by adding water to 0.207 grams of an unknown organic acid until the volume totaled 25.00 mL. Subsequent titration required 40.50 mL of 0.113 M sodium hydroxide. Calculate the molar mass of the unknown organic acid (g/mol) given the following balanced equation.
HZ(aq) + NaOH(aq) -> NaZ(aq) + H2O(l)
45.2 g/mol