Acids & Bases
www.drlakshmisharma.comDr Lakshmi Sharma
NO LIMITS TO LEARNING! BELIEVE & YOU CAN ACHIEVE!
Enrichment workshop for Gifted Kids
What will happen next ?
Drop an old coin in coke & watch what happens !
Now think of your teeth when you drink Coke !
Household cleaners
Drain cleaners
Oven cleaners
sodium hydroxide & ammonia
Weak bases-toothpaste
antacid tablets & Baking powder.
Bases
Strongest - Super !!!!!
• Carborane Acid H(CHB11Cl11) pka -25
• Lithium Diisopropylamide [(CH3)2CH]2NLi pkb 22
Body Buffer pH
Outside the acceptable range of pHProteins are denatured and digested Enzymes lose their ability to functionDeath may occur
Red Litmus Blue Litmus
Acidic solution Stays red Turns red
Neutral solution Stays red Stays blue
Alkaline solution Turns blue Stays blue
Litmus Paper
pH Meter
Red cabbage - flavin (an anthocyanin)-
indicator
pH 2 4 6 8 10 12
Color Red Purple Violet Blue Blue-Green Greenish Yellow
Bouncing Egg !!!! Soak hard boil or raw egg in vinegar for 1-2 days
Bath FizzSodium bicarbonate reacts with citric acid when dissolved in water
3NaHCO3 + C6H8O7 --> C6H5Na3O7 + 3CO2 + 3H2O
Bath Fizzes
1. Take all of the ingredients provided & roll into a ball
2. Leave to dry 3. Wrap & surprise mum & Dad!4. Have a nice bath !!!!