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PH indicators

Acid and Base Lab (unanswered)

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Name:______________________________________ Data EXPERIMENT 1 Litmus Paper ? COLOR CHANGE ? HYDROCLORIC ACID SODIUM HYDROXIDE RED LITMUS PAPER ? ? BLUE LTIMUS PAPER ? ? EXPERIMENT 2 Cabbage Indicator ? COLOR CHANGE AFTER 5 DROPS COLOR CHANGE AFTER 10 DROPS TEST TUBE 1 ? ? CABBAGE INDICATOR W/ HYDROCHLORIC ACID ? ? ? TEST TUBE 2 ? ? CABBAGE INDICATOR W/ SODIUM HYDROXIDE EXPERIMENT 3 Neutralization Reaction Describe what color changes you observed as you combined the content of the two test tubes. EXPERIMENT 4 Hydrion Paper ? COLOR CHANGE pH HYDROCHLORC ACID ? ? SODIUM HYDROXIDE ? ? CARBONC ACID (SELTZER WATER) ? ? ACETIC ACID (VINEGAR) ? ? MAGNESIUM HYDROXIDE & ALUMINUM HYDROXIDE

CHEM 1A midterm 2 2012

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Chemistry 1A, Fall 2012 Midterm Exam #2 October 17, 2012 (90 min, closed book) Name:__________________________________ SID:___________________________________ GSI Name:________________ Discussion Day/Time: ________________ ? The test consists of 5 short answer questions and 22 multiple choice questions. ? Put your written answers in the boxes provided. Answers outside the boxes may not be considered in grading. ? Write your name on every page of the exam. Question Page Points Score Multiple Choice (1-22) 2-7 88 Titration Short Answer 6 Soda (1) Short Answer 4 Soda (2) Short Answer 4 Ocean Acidification Short Answer 4 Indicators Short Answer 4 Total 110

CHEM 1A midterm 2 key

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Chemistry 1A, Fall 2012 Midterm Exam #2 October 17, 2012 (90 min, closed book) Name:_____________KEY____________________ SID:___________________________________ GSI Name:________________ Discussion Day/Time: ________________ ? The test consists of 5 short answer questions and 22 multiple choice questions. ? Put your written answers in the boxes provided. Answers outside the boxes may not be considered in grading. ? Write your name on every page of the exam. Question Page Points Score Multiple Choice (1-22) 2-7 88 Titration Short Answer 6 Soda (1) Short Answer 4 Soda (2) Short Answer 4 Ocean Acidification Short Answer 4 Indicators Short Answer 4 Total 110

Blue Light

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Title: Blue Light Date: September 14, 2010 Name: Ciar?n McGirr Purpose Hypothesis- If the light wave length is changed then the rate of photosynthesis will slow down Prediction- The blue light will slow down the rate of photosynthesis as evidence by the pH level. Materials Beaker Colored Cellophane Test Tubes Distilled Water Graduated Cylinder Tape Bromothymol Blue Tap Water pH Probe 2 Sprigs of Elodea Thermometer Probe Drinking Straw Fluorescent Lamp Procedure Place 125 mL of distilled water into a test tube Place a straw into the test tube and blow into the tube through the straw for 3 minutes Add 2.5 mL of bromothymol into the beaker Place Elodea into the test tube Use pH probe to test the pH level Place the test tube into 300 mL of water
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