What is the average molarity ————? Show calculation. Desk Date REPORT SHEET EXPE

Question

What is the average molarity ————? Show calculation. Desk Date REPORT SHEET EXPERIMENT Determination of the 25 Dissociation Constant of a Weak Acid B. Standard ization of Sodium Hydroxide (NaOH) Solution Trial 1 Trial 2 Trial 3 Mass of bottle + KHP Mass of bottle Mass of KHP used 0.4+13 0.131 1sg Final buret reading Initial buret reading mL of NaOH used o gml om Molarity of NaOH O2M 000203 M ?.OOLO2N o oolo3(n Average molarity (show calculations and standard deviation) .0o2026 Standard deviation (see Experiment 8) . 3xlo

Explanation / Answer

Average molarity = ( 0.00203 + 0.00202 ) / 2 = 0.002025 M

Square differences,

1. ( 0.00203 - 0.002025 )2 = 0.000000000025

2. ( 0.00202 - 0.002025 )2 = 0.000000000025

Squared sum = ( 0.000000000025 + 0.000000000025 ) = 0.00000000050

Standard deviation = sqrt.[ sqared sum / ( N - 1 ) ]

S = sqrt. ( 0.000000000050 / 1 )

S = 7.07 * 10-6

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