How would you best describe the red or pink solutions labeled “2-4”?
How would you best describe the purple to blue solution labeled “7”?
How would you best describe the yellow-green solution labeled “11”?
Which statements are part of the safety protocol for this lab experiment? Check all that apply.Behavior in the lab needs to be purposeful. Exercise caution when using the hot plate, as it can cause burns.Ice used in this lab can melt quickly. Be sure to insulate your containers.Label your glassware and paper cups clearly and appropriately. Many chemicals appear to be the same.Check glassware, such as beakers and test tubes, for cracks and chips prior to use.A fume hood should be used to collect any potentially harmful vapors.Wear the right gear, such as chemically resistant gloves and oven mitts, when performing the experiment.
The independent variable, the one that is intentionally manipulated, is .
Does taking 1 mL of solution Y (pure bleach) out of the first beaker change the solution’s concentration?
What did you include in your hypothesis? Check all that apply.
The dependent variable, the one that you measure the response in, is .
What would the concentration of the second beaker be?
If Beaker #2 is a 1% solution of Y, and Beaker #3 is 1/100th of that in the final solution, what percentage solution would Beaker #3 be?
In this experiment, you will use a natural indicator to indirectly determine the H+ concentration of some common household solutions to determine a physical characteristic of the solution. In the space below, write a scientific question that you will answer by doing this experiment.
In this experiment, you will use a natural indicator to indirectly determine the H concentration of some common household solutions to determine a physical characteristic of the solution. In the space below, write a scientific question that you will answer by doing this experiment.
What did you include in your question? Check all that apply.
Write a hypothesis about the pH level of common household solutions based on what you know about their physical and chemical properties. Use the format of "if . . . then . . . because . . .” and be sure to answer the lesson question "How is pH used to determine if a solution is acidic or basic?”
Write a hypothesis about the pH level of common household solutions based on what you know about their physical and chemical properties. Use the format of "if . . . then . . . because . . .” and be sure to answer the lesson question "How is pH used to determine if a solution is acidic or basic?”
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