Penny Lab & pH Lab.

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Presentation transcript:

Penny Lab & pH Lab

NBpg 32: PENNY LAB Include these words in your explanations: adhesion, cohesion, surface tension, volume, surface area Question: How many drops of water can a penny hold with tap water and soapy water? Predict # : Tap water ____ Soapy water ____ Hypothesis (If…then…) Experiment: Do 3 trials for tap and soapy water. Count how many droplets of water fit on a penny. Data: Graph: Create a graph based on the data, and remember TAILS Analyze: (2+ sentences) Does tap or soapy water have more surface tension? Conclusion:(+3 sentences) Restate your Hypothesis, was it accepted or rejected. Explain why, by summarizing the data. Trial 1 Trial 2 Trial 3 Aver. Tap Soapy

pH Activity (Set-up) NBpg. 34 Draw pH Scale with labels  Battery Acid Gastric Acid Vinegar Soda Acid Rain Black Coffee Urine/Saliva Tap Water Sea Water Baking Soda Tums Ammonia Soap Bleach Drain Cleaner Draw pH Scale with labels  Then place 5 substances into the 5 wells. Match the numbers! Use the Litmus Paper to find the pH and determine the sample using the pH scale. 1. 2. 3. 4. 5. Vinegar Soda (sprite) Tap water Alkaline water/Baking soda Bleach Make an inference about each substance Claim: (answer in a statement format) Evidence: (scientific data) Reasoning: (scientific explanation using vocab words)

Acid and Base Activity NBpg. 34 Draw pH Scale with labels Battery Acid Gastric Acid Vinegar Soda Acid Rain Black Coffee Urine/Saliva Tap Water Sea Water Baking Soda Tums Ammonia Soap Bleach Drain Cleaner Draw pH Scale with labels Then place 5 substances into the 5 wells. Match the numbers! Use the Litmus Paper to find the pH and determine the sample using the pH scale. 1. 2. 3. 4. 5. Vinegar Soda (sprite) Tap water Alkaline water/Baking soda Bleach Make an inference about your stomach: is it an acid or alkali? If you had an upset stomach, which of the 5 substances you tested would act as a buffer to calm your stomach? Claim: (answer in a statement format) Evidence: (scientific data) Reasoning: (scientific explanation using vocab words)