You will need the following data R-8.314 kPa L mol\'K-1 T from the information a

Question

You will need the following data R-8.314 kPa L mol'K-1 T from the information above in Kelvin V from the information above in L P in kPa Note: the units all have to be in the same form when used in calculations!! H202 density is 1.02 g/mL · 5 mL of a solution containing an unknown decomposed at 25 °C releasing 48 mL of gas. The temperature of the container used to measure the volume of gas produced was 20 °C To find BOTH the concentration of hydrogen peroxide in the solution AND the percentage of hydrogen peroxide in solution work through the following steps. concentration of hydrogen peroxide was 1. Rearrange the ideal gas law to solve for n. Convert the temperature of the water in the collection vessel from °C to Kelvin (K). Therefore: T = 2. 3. Convert the current barometric pressure in the room from hPa to kPa. The Macquarie university weather station data can be used to find the pressure http://aws.mq.edu.au. Use the current pressure which is given in hectopascals. Use 1018 hPa if unavailable. 10 hPa- 1 kPa So divide hPa by 10 to convert to kPa. 4. Convert the volume of oxygen from mL to Liters. are now ready to solve for the number of moles of Oz. Be sure the units cancel so that you end up with only the moles of o2

Explanation / Answer

1. The ideal gas equation is : PV = n R T

So, n = PV / (RT) ............(1)

2. The collection vessel has temperature = 20

= 273 + 20 = 293 K

So, T = 293 K

3. Since pressure is not given , so P = 1018 hPa

Hence P = 1018 h Pa = 101.8 kPa

4. Volume of the gas collected = 48 ml = 0.048 L

Putting all the values in (1) to calculate n

n = 101.8 kPa × 0.048 L /{ ( 8.314 kPa L mol^-1 K^-1) × 293 K}

n = 0.002 mol

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.