pH lab acids and bases

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pH lab acids and bases

• ACIDS Sour taste (dont taste any materials),
  corrodes metals, found in many food products
• BASES Bitter taste (dont taste), Feels
  slippery, alkaline, denatures proteins, strong
  bases are VERY dangerous to human because
  proteins will be permenantly damaged.

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SAFETY

• WASH YOUR HANDS BEFORE USING THE LITMUS PAPER
• VERY CAUSTIC MATERIALS
• WASH YOUR HANDS AFTER THE LAB
• WASH YOUR HANDS IF YOU SPILL ANYTHING ON YOU

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CHANGES TO LAB

• PART A IN THE TABLE
• 6 EGG WHITES
• 11 LYSOL
• 13 SIMPLE GREEN
• 14 DR. PEPPER
• 17 DISH SOAP WITH BLEACH
• PART B IN PROCEDURE AND TABLE
• 1 AND 7 USE ONLY 10 ml WATER AND MILK, NOT 20
  ml

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FIRST PREDICT

• IN PREDICTION COLUMN
• SA STRONG ACID
• WA WEAK ACID
• N NEUTRAL
• WB WEAK BASE
• SB STRONG BASE
• DO NOT PUT ANYTHING IN LAST COLUMN UNTIL TOMORROW

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P
pH lab

• RINSING TUBE
• LITMUS PAPER ACID/BASE INDICATOR
• 17 FOR PART A, 8 FOR PART B
• HOW ARE YOU TESTING THE pH?
• mL full squeeze
• CONTAMINATION
• GRADED ON FOLLOWING DIRECTIONS, WRITE UP TOMORROW

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• WHEN YOU ARE DONE
• RINSE OUT EACH TUBE IN THE SINK!!!!
• RINSE OUT H2O TUBE (RINSING TUBE) AND ADD NEW
  WATER FROM THE BEAKER ON YOU STATION
• USE THE SPRAY AND WIPE DOWN YOUR COUNTER
• WASH YOUR HANDS
• KEEP YOUR PAPERS, WE WILL FINISH THE WRITE UP
  TOMORROW
• TURN YOUR NOTEBOOK BACK INTO THE DRAWER

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Page 1
Page 2
PART A GRAPH
pH LAB ACIDS, BASES AND BUFFERS
PART A TABLE
PART B GRAPH
PART B TABLE
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Page 3
Page 4

• CUT AND PASTE QUESTIONS
• ANSWERS TO QUESTIONS
• ANSWERS
• ANSWERS
• ANSWERS
• ANSWERS
• ANSWERS
• ANSWERS
• ANSWERS
• ANSWERS

pH scale (copy from next slide and enter in your
results)
Page 3
Page 4
9
PART A
10
PART B
11
Page 4
pH scale
Neutral
Strong acids
Weak acids
Strong bases
Weak bases

• COPY THIS SCALE DOWN AND COLOR AS SHOWN HERE
• LABEL YOUR RESULTS

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• GENERAL NOTES FOR PH LAB
• MAKE SURE TO FOLLOW ALL GRAPHING EXPECTATIONS FOR
  FULL CREDIT
• DUE MONDAY AT END OF CLASS
• WORTH 40 PTS 10 PTS PER PAGE
• LEAVE YOUR NOTEBOOKS HERE
• WE WILL FINISH CROSSWORD ON MONDAY
• IF YOU WANT TO DONATE A PENCIL FOR 1 PT EX. CR.
  YOU CAN DO THAT NOW