| 39 Results |
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| Solution Concentrations (Other (1)) |
| A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook. |
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| Solutions (Other (1)) |
| A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook. |
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| Solutions (Movie/Animation, Audio/Visual (9)) |
| Reactions and demonstrations exploring the concepts of solutions. |
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| Crystallization of Supersaturated Sodium Acetate (Movie/Animation, Audio/Visual (3)) |
| A supersaturated solution of sodium acetate is poured onto one small sodium acetate crystal. Crystals form from the liquid immediately upon contact with the seed crystal. A thermometer shows that the crystallization process is exothermic. A chemical hot pack is shown as an example of a commercially available supersaturated solution. |
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| Enthlapy-Thermodynamics (Movie/Animation, Audio/Visual (10)) |
| Reactions and demonstrations the explore thermodynamic concepts. |
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| Solutions : CalcMolarityFromPPT (10 Variations) (Assessment Material (1)) |
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) |
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| Solutions : WtPercentToMolarity (4 Variations) (Assessment Material (1)) |
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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? |
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| Solutions : GramsToMolalSoln (20 Variations) (Assessment Material (1)) |
How many grams of citric acid need to be added to 750 ml of ethanol to make a 0.50 m solution?
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Density (g/ml)
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Molecular Weight (g/mol)
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Citric acid
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1.665
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192.14
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Ethanol
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0.7893
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46.07
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| Solutions : ConvertConcUnits (10 Variations) (Assessment Material (1)) |
| 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.) |
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| Solutions : SolnPrepByMass (4 Variations) (Assessment Material (1)) |
| 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? |
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| Solutions : SolnPrepByDilution (10 Variations) (Assessment Material (1)) |
| 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? |
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| Solutions : ReverseOsmosis (20 Variations) (Assessment Material (1)) |
| 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? |
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| Solutions : FreezePtDepression (20 Variations) (Assessment Material (1)) |
| 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.) |
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| Soap and Detergent (Activity, Instructional Material (9)) |
| ACS Science for Kids activities explore the properties of soap in aqueous solutions. |
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| Dissolving (Activity, Instructional Material (7)) |
| ACS Science for Kids activities exploring the process of dissolving chemicals in solution. |
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| Characteristics of Materials (Activity, Instructional Material (7), Test, Assessment Material (15)) |
| What makes diapers absorbent? Is peanut butter stickier than syrup or jelly? Strong, stretchy, sticky, or sweet—everything around us has special properties which make them unique. See if you can identify and compare the characteristics of materials. |
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| Chemical & Physical Change (Activity, Instructional Material (4), Test, Assessment Material (5)) |
| Everything you see and touch has the ability to change. Sometimes substances change to form new substances. This is called a chemical change. Other times substances change but keep the same identity. This is called a physical change. Try these activities to learn more about chemical and physical change. |
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| Art-ACS Science for Kids (Activity, Instructional Material (12)) |
| ACS Science for Kids activities exploring the chemistry involved in art. |
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| Dilution in Mixing Zones () |
| A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook. |
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