TIGER

Assessment Questions: 26 results
Solutions : FreezePtDepression (20 Variations)
It takes 6.86 kg of ethylene glycol (antifreeze) to decrease the freezing point of 6.50 kg of water to -25.0oF (-31.7oC). How much sodium chloride (NaCl) would it take to decrease the freezing point of 6.50 kg of water to -25.0oF? (Assuming all the salt will dissolve in that amount of water.)
Solutions / Solvents
Solutions : GeneralSolutions (10 Variations)
You have 500.0mL of 0.100M aqueous MgBr2. Which of the following statements are true?
Solutions / Solvents
Solutions : SolnPrepProcedure (10 Variations)
You want to prepare 250mL of a 0.0150M solution of KCl. Which of the following procedures would give you the best results?
Solutions / Solvents
Solutions : SolutionNanoPics (4 Variations)
The drawings below represent flasks of aqueous solutions. Each pink dot represents a dissolved solute particle.
Which of the following solutions is most concentrated?

500 mL
Solution A
500 mL
Solution B
500 mL
Solution C
250 mL
Solution D
250 mL
Solution E
250 mL
Solution F


Solutions / Solvents
Solutions : IonConcentration (4 Variations)
Which of the following solutions has the greatest concentration of Na+ ions?
Solutions / Solvents |
Chemometrics
Solutions : MassSoluteInSoln (10 Variations)
What is the mass of the solute in 500mL of 0.341M ammonium chloride?
Solutions / Solvents |
Chemometrics
Solutions : RelativeConc (4 Variations)
What are the relative concentrations of the ions in 0.10 M aqueous sulfuric acid?
Solutions / Solvents |
Stoichiometry
Solutions : ReverseOsmosis (20 Variations)
You are given a water sample that contains ammonium chloride (NH4Cl). You determine the concentration of the salt to be 0.500 M and decide to purify the water using reverse osmosis. What is the minimum pressure that must be applied at 30.0oC to force the water through the membrane?
Solutions / Solvents |
Transport Properties
Solutions : SolnConcAfterMixing (4 Variations)
10 mL of 0.1 M BaCl2(aq) is mixed with 10 mL of 0.1 M AgNO3(aq). What are the concentrations of the ions in the final mixture?
Solutions / Solvents |
Chemometrics
Solutions : SolnPrepByDilution (10 Variations)
For the analysis of trace metals it is necessary to prepare solutions of very low concentrations from a stock solution of higher concentration using a micropipet and a volumetric flask. What volume of a 0.0010 M solution of Zn(NO3)2 (aq) would be required to prepare a 5.0 nM solution of Zn2+ in a 250mL flask?
Solutions / Solvents |
Chemometrics
Solutions : SolnPrepByMass (4 Variations)
You are required to prepare 5 L of a solution containing 1.000 x 10-3 mol/L of Cu2+(aq). Which of the following procedures would produce an appropriate solution?
Solutions / Solvents |
Chemometrics
Matter_and_Measurement : QualQuantObserv (10 Variations)
Which of the following statements are quantitative observations about carbon?
Physical Properties
Solutions : ConvertConcUnits (10 Variations)
The maximum concentration of arsenic in drinking water that is allowed by the EPA is 0.050 mg/L. Express this as a weight percent. (You can assume the density of the water solution is 1.0g/mL.)
Solutions / Solvents |
Nomenclature / Units / Symbols |
Chemometrics
Solutions : GramsToMolalSoln (20 Variations)
How many grams of citric acid need to be added to 750 ml of ethanol to make a 0.50 m solution?

Density (g/ml)

Molecular Weight (g/mol)

Citric acid

1.665

192.14

Ethanol

0.7893

46.07


Solutions / Solvents |
Nomenclature / Units / Symbols |
Chemometrics
Solutions : MixturesMolcPics (11 Variations)
Which of the following combinations of substances corresponds to the molecular scale diagram shown below?

Solutions / Solvents |
Noncovalent Interactions |
Precipitation / Solubility
Solutions : WtPercentToMolarity (4 Variations)
A common concentration unit used commercially is percent weight per volume (%W/V) which is the number of grams of solute in 100 mL of solution. A bottle of vinegar contains 5 %W/V acetic acid (CH3COOH). What is the molar concentration of acetic acid in the vinegar?
Solutions / Solvents |
Nomenclature / Units / Symbols |
Chemometrics
Solutions : CalcMolarityFromPPT (10 Variations)
You are given a water sample to analyze from a lake contaminated with lead. It takes 24 mL of 0.020 M NaCl to exactly precipitate the Pb2+ ions from 61 mL of the water sample. What is the concentration of Pb2+ ions in the water?
Pb2+(aq) + 2NaCl(aq)PbCl2(s) + 2Na+(aq)

Solutions / Solvents |
Nomenclature / Units / Symbols |
Chemometrics
Gases : GasProperties (9 Variations)
Which of the following is NOT a property of gases?
Gases |
Physical Properties
Matter_and_Measurement : CalcDensity (5 Variations)
What is the density of a 7000 gram brick that is 4 inches x 5 inches x 3 inches?
Physical Properties |
Solids
Matter_and_Measurement : PhysOrChemChange (10 Variations)
Which of the following are physical changes?
Physical Properties |
Reactions
Matter_and_Measurement : UseDensity (10 Variations)
If a 10.0 inch aluminum skillet weighs 3 pounds, how many cm3 of aluminum does it contain? The density of aluminum is 2.70 g/cm3.

Physical Properties |
Solids |
Chemometrics
Intermolecular_Forces__Liquids_and_Solids : ClassifySolids (10 Variations)
Classify each of the following substances, in the solid state, as molecular, ionic, covalent network, or metallic.

Substance Appearance Melting Pt. (¬?C) Boiling Pt. (¬?C) Conducts as solid Conducts as liquid
A Colorless crystal -121 20.8 no no
B Colorless crystal 846 1505 no yes
C Silvery gray 1675 3260 yes yes
D Colorless crystal 1713 2590 no no


Solids |
Physical Properties
Intermolecular_Forces__Liquids_and_Solids : ElectricalConductivity (8 Variations)
Which of the following has the greatest electrical conductivity?
Solids |
Metals |
Physical Properties
Acids_and_Bases : PracticalAcidBase (20 Variations)
Which of the following statements is true?
Acids / Bases |
Reactions |
Aqueous Solution Chemistry |
Physical Properties
Nomenclature (10 Variations)
A collection of 10 assessment questions about Nomenclature
Physical Properties |
Carboxylic Acids |
Esters |
Molecular Properties / Structure |
Aromatic Compounds |
Amines / Ammonium Compounds |
Phenols |
Nomenclature / Units / Symbols |
Alkanes / Cycloalkanes |
Stereochemistry
Alcohols and Ethers (22 Variations)
A collection of 22 assessment questions about Alcohols and Ethers
Alcohols |
Synthesis |
Oxidation / Reduction |
Aldehydes / Ketones |
Alkenes |
Carboxylic Acids |
Grignard Reagents |
Ethers |
Reactions |
Mechanisms of Reactions |
Organometallics |
Nomenclature / Units / Symbols |
Physical Properties