Making IA Please help me Chemistry IA ( Format IB chemistry IA)only High experiencedChemistry IA
– Independent variable
– Volume of NaOH added
– Dependent variable
– PH and Concentration of Tomato juice
– Controlled variable
– Concentration of NaOH
– Volume of Tomato juice
– Temperature(RTP)
– 10mL of Tomato juice
– 50mL of Tomato juice
– 100mL of Sodium hydroxide(NaOH with 0.1 mol)
– 10mL pipette
– 50mL burette
– 100mL beaker
– Funnel
– Distilled water
– Weight scale
– PH sensor
– Data Logger
– Stand
– Clamp
– Stirring rod
– Calibrator
– Goggles
– Gloves
– Lab Coats
Preparing for the Titration
Equivalent point = 20.5
PH of NaOH = 12.36
0.1 mol of NaOh should be PH of 13
PKa= half of PH of equivalent point = 5
Uncertainty of PH censor
Acids in Tomato juice? Citric acid
PKa difference 4.8
Ka Value of Citric acid = 7.1 x 10-4
Finding the concentration of Tomato juice
20mL of NaOH
50 mL of Tomato juice
0.04 mol
PH wasn’t the same for NaOH
0.025 Molar
0.01 Molar
Potassium hydrogen Phthalate titration – sodium hydroxide
Data Table

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