Curated OER
2002 U.S. National Chemistry Olympiad National Exam - Part I
As to be expected from the American Chemical Society Olympiad Examinations Task Force, this 60-question test tops the charts in terms of excellence. It consists entirely of multiple choice questions designed to assess a year's worth of...
Curated OER
Cell Size and Shape; Diffusion and Osmosis Processes
Use salmon eggs as a cell model for demonstrating the movement of water over concentration gradients. Junior scientists examine the same process microscopically with an onion cell. They use a thistle tube and a semipermeable membrane to...
Curated OER
Matter in Solution
In this solutions activity, students review types of solutions, concentration and saturation of solutions, and suspensions and colloids. This activity has 10 fill in the blank, 7 multiple choice, and 6 short answer questions.
Chemistry Collective
Virtual Lab: Determination of the pH Scale by the Method of Successive Dilutions
Where did the pH scale come from? Take a deeper look at a most important measure of ion concentration using a simulated physical determination. Young chemists prepare a series of dilutions after determining a dilution factor for the...
Mr. E. Science
Acids, Bases and Solutions
If you are not part of the solution, then you are part of the precipitate. The presentation covers solutions, suspensions, solubility, dissociation, and acid/base reactions. This is the 19th lesson in a series of 26.
Curated OER
Rates of Chemical Reactions-The Iodine Clock Reaction
Students investigate the reaction rate of iodine and soluble starch. For this rates of chemical reactions lesson plan, students study the effects of varying concentrations of reactants and varying temperatures of reactants on the...
Curated OER
Chemistry 12 pH Worksheet
Emerging chemists find their calling as they calculate the concentration of hydronium and hydroxide ions and the pH and pOH for several solutions. In some cases, values are given, and in others, actual word problems are written out....
Curated OER
Molarity
In this molarity activity, students determine the concentration or molarity for each of the solutions. Students manipulate the molarity formula to calculate the moles, mass, or volume of each problem.
Curated OER
Chapter 15 Review/Acid-Base Titration and pH
Chemistry stars calculate ion concentrations, pOH, or pH in different solutions. For questions in the latter half of the activity, they also have to explain why a solution is acidic, basic, or neutral and solve for molarity of a solute....
Curated OER
Microscale Chloride Determination in Salt Water
Students determine the concentration of chloride ions in seawater. In this determination of chloride ions lesson plan, students perform a titration of sea water with silver nitrate and an indicator to determine the chloride ion...
Biology in Motion
Urine Concentration in 3 Easy Steps
The color, density, and smell of urine all relate to kidney function. Pupils observe the kidney controlling the concentration of water through three different steps. It mentions how each function might change the appearance and scent of...
PhET
Beer's Law Lab
Beer's Law can be used to measure the concentration of certain compounds in samples of food. In the concentration simulation, particpants change and measure the concentration of different solutions by manipulating various types of...
Curated OER
# 14 Experimenting with Copper (II) Solutions
Students determine that the relative concentration of copper ions in water can be determined by a color comparison. They make a copper (II) sulfate solution of a given concentration. Students dilute their initial solutions until their...
Curated OER
Summer Intern
Your young apprentices build a function describing the percent concentration of salt in a brine. The rational function is then related to the parent function, y= 1/x, and graphed. Finally, the apprentices predict the amount of fresh...
Curated OER
Mixing Fertilizer
Your young landscapers do concentration calculations in this problem dealing with mixing fertilizer. Learners use and analyze rational expressions within this context.
Virginia Department of Education
Equilibrium and Le Chatelier’s Principle
The best part of learning about equilibrium is that nothing changes. Young chemists observe four demonstrations during this instructional activity: equilibrium in a saturated solution, equilibrium with an acid-base indicator, equilibrium...
Nuffield Foundation
Investigating the Effect of Concentration of Blackcurrant Squash on Osmosis in Chipped Potatoes
Model and explore osmosis using squash and potatoes. Young scientists expose chunks of potatoes to different concentrations of a squash solution. They compare the weights of the chunks before and after exposure to the solution and use...
Curated OER
Solutions Homework Problem Set
In this chemistry worksheet, students determine the vapor pressure of a solution when dissolved in water at a set temperature. Then they determine the vapor pressure of this solution at a higher temperature. Students also explain the...
Curated OER
Solution Concentration
Students determine differences in concentrations. They have to state the problem they feel exists, consider possible solutions, and develop a plan to come up with for containers whose labels have fallen off. Students base this off the...
Curated OER
The Effect of Concentration Changes on Equilibrium
In this concentration changes and equilibrium worksheet, students experiment with iron (III) ions and thiocyanate ions to observe the effects of concentration on the equilibrium of solutions. Students make observations of their mixtures,...
Curated OER
Parts-Per-Million Concentration Lab
Students develop a comprehension of parts per million as a concept. They work in teams to create successive dilutions of a solution to reach a parts-per-million concentration. Students list what they think the atmosphere is made of. They...
Curated OER
The Action of A Buffer Solution
In this buffer solution instructional activity, students experiment with the addition of different solutions to a buffer solution and observe the changes in pH using a pH probe. Students describe the differences among the addition of...
Curated OER
Volumetric Analysis 1- To Make a Standard Solution of Sodium Carbonate
In this volumetric analysis worksheet, students prepare a standard solution of sodium carbonate by following the given directions. They later use the prepared solution in a laboratory practical.
Curated OER
Does Size Matter?
Students explore chemical solutions. For this chemistry lesson, students investigate the relationship between three related experiments about solutions. Students determine variables that affect the chemical concentration of each solution.