The goal of Experiment 1 in Lab 9 is to find the percentage of hydrogen peroxide

Question

The goal of Experiment 1 in Lab 9 is to find the percentage of hydrogen peroxide in the solution. This can be found by using your data and the ideal gas law equation. To determine percentage, you need to find out how many moles of hydrogen peroxide are present, which means you need rearrange PV=nRT to solve for n, and you need to plug in your known values for P, V, R, and T. But, you have to use proper units for the equation to work.

So, show your calculations from Experiment 1 for converting your temperature (T) to Kelvin.

NOTE: All work must be shown. Skipping steps or lack of clarity in steps will result in loss of points. All units must be properly labeled. Be sure to click on "Show/Hide Rich Text Editor" above your answer box so you can include subscripts, superscripts, etc. as needed. If your formatting is unclear (be careful, then about copy/pasting--it is much wiser to type your answer directly into the answer box rather than copy/pasting!), you will not receive credit.

Table 1: Temperature, Pressure and Volume Data

Temperature of Distilled H2O:

Room (or regional) Pressure (atm):

Initial Volume

of Air (mL)

Final Volume of Air

(after reaction) (mL)

Volume of O2 Collected

(Final Volume - Initial Volume)

35.3 C

25 C

45mL

88mL

88mL-45mL=43mL

Table 2: Reaction Time Data

Time Reaction Started

Time Reaction Ended

Total Reaction Time

0.01

0.47

0.46

I converted my temperature 35.3 C + 273.15K = 313.45K

Converting to atm

The goal of Experiment 1 in Lab 9 is to find the percentage of hydrogen peroxide in the solution. This can be found by using your data and the ideal gas law equation. To determine percentage, you need to find out how many moles of hydrogen peroxide are present, which means you need rearrange PV=nRT to solve for n, and you need to plug in your known values for P, V, R, and T. But, you have to use proper units for the equation to work.

So, show your calculations from Experiment 1 for converting your pressure (P) to atm. (If you obtained the pressure originally in atm without converting, then convert atm to mmHg to demonstrate you know how to do this conversion.)

Converting to L

The goal of Experiment 1 in Lab 9 is to find the percentage of hydrogen peroxide in the solution. This can be found by using your data and the ideal gas law equation. To determine percentage, you need to find out how many moles of hydrogen peroxide are present, which means you need rearrange PV=nRT to solve for n, and you need to plug in your known values for P, V, R, and T. But, you have to use proper units for the equation to work.

So, show your calculations from Experiment 1 for converting your volume (V) from milliliters (mL) to liters (L).

Temperature of Distilled H2O:

Room (or regional) Pressure (atm):

Initial Volume

of Air (mL)

Final Volume of Air

(after reaction) (mL)

Volume of O2 Collected

(Final Volume - Initial Volume)

35.3 C

25 C

45mL

88mL

88mL-45mL=43mL

Explanation / Answer

Converting Pressure to atm then to mmHG

The room pressure at 25 C is 1 atm if door and window are open.

to convert atm to mmHg we have to multiply the pressure by 760

Room pressure = 1 atm = 1 atm * 760 mmHg atm-1 = 760 mmHg

Converting Volume from milliters(ml) to litres(L)

to convert ml to L we have to divide the volume by 1000

Volume of O2 collected = 43ml = 43/1000 L = 0.043 L

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