Complete the data tables below using the correct significant digits. A few calcu

Question

Complete the data tables below using the correct significant digits. A few calculation results are shown for you. A. Standardization of a Sodium Hydroxide Solution SAMPLE: Potassium Hydrogen Phthalate (KHHC,H,O)-Gram Molecular Weight 204.23 You may wish to verify one or more of these to ensure that you are using the correct method of calculation mple 1 Sample 2 Sample 3 Mass of Sample Moles of Sample Initial Buret Volume Final Buret Volume Total Volume Moles of NaOH NaOH Molarity 0.350 0.00171, 0.10 14.36 0.442 0.484 grams mole 0.57 18.38 0.76 mL 20.88 mL 0.01426 0.00171 0.120 0.02012 Liters mole mole/L mole/L 0.00216 o | 0.121 Average Molarity Range of Molarities 0.003. mole/L B. Mass Percent of Potassium Hydrogen Phthalates Sample 1 Sample 2 0.759 0.06 21.80 0.628 grams 1.21 mL 19.2 ml 0.017%) Liters Mass of Unknown Initial Buret Volume Final Buret Volume Total Volume Moles of NaOH Moles of KHP Mass of KHP 0.681 1.0 20.33 0.0193 0.00260 mole 0.00215 mole 0.439, 8 0.471 69 Mass Percent KHP Average Mass Percent Range of Mass Percent204 0.64 1 % Unknown Number

Explanation / Answer

A. Standardization of sodium hydroxide solution.

Moles = mass/molar mass

molar mass of KHC8H4O4 = 204.23

So, MOLES For Sample 2:= 0.442/204.23 = 0.00216

MOLES For Sample 3:= 0.4824/204.23 = 0.00237

Next, Total volume = final volume - initial volume and change to liters.

VOLUME For sample 2: 18.38-0.57 = 17.81 = 0.01781

VOLUME For sample 3: 20.88 -0.76 = 20.12 = 0.02012

Next,

Moles of NaOH For sample 3 = moles of KHC8H4O4 = 0.00237

NaOH molarity For sample 3 = moles/volume = 0.00237/0.02012 = 0.118

(4 parts at a time)

Have a nice day!

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