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# How does the ideal gas law lab use a eudiometer?

## How does the ideal gas law lab use a eudiometer?

The eudiometer is carefully turned upside down and placed into a tub of water without letting air enter the eudiometer. The acid goes down the eudiometer and reacts with the magnesium metal. Hydrogen bubbles up and it forces the water out the bottom. Students then can record the volume of gas.

What does a eudiometer measure?

Eudiometer tubes are used to measure the volume of gas produced or consumed in a chemical reaction.

How do you find the pressure of hydrogen in a eudiometer?

According to Dalton’s Law of Partial Pressures, the total gas pressure in the eudiometer is the sum of the pressure of the hydrogen gas collected plus the water vapor pressure. Symbolically, Ptotal = PH2 + PH20. Subtracting the water vapor pressure from the total pressure gives the pressure of the dry hydrogen gas.

### What units are used in the ideal gas law?

In SI units, p is measured in pascals, V is measured in cubic metres, n is measured in moles, and T in kelvins (the Kelvin scale is a shifted Celsius scale, where 0.00 K = −273.15 °C, the lowest possible temperature).

What conditions cause the greatest deviations from the ideal gas law?

High pressure, where the volume is too low to satisfy the premise of kinetic molecular theory that assumes gas molecules’ volumes are “negligible” to the container in which they are contained. For instance, a gas at 5 atm and 50°K will probably deviate from ideal behavior.

How do you calculate PH2?

1. PH2 = 749.2 – 19.89 = 729.31 mm of Hg = P1.
2. Volume of H2(g) = 38.2 mL = 0.0382 L = V1.
3. At STP:
4. Pressure = 760 mm of Hg = P2.
5. Temperature = 273 K = T2.

#### What does N stand for in ideal gas law?

The ideal gas law states that PV = NkT, where P is the absolute pressure of a gas, V is the volume it occupies, N is the number of atoms and molecules in the gas, and T is its absolute temperature.

How to calculate the ideal gas law equation?

Ideal gas law equation. The properties of an ideal gas are all lined in one formula of the form pV = nRT, where: p is the pressure of the gas, measured in Pa, V is the volume of the gas, measured in m^3, n is the amount of substance, measured in moles, R is the ideal gas constant and.

Why is the pressure of gas in an eudiometer important?

Similarly, a eudiometer uses water to release gas into the eudiometer tube, converting the gas into a visible, measurable amount. A correct measurement of the pressure when performing these experiments is crucial for the calculations involved in the PV = nRT equation, because the pressure could change the density of the gas.

## What is the value of the ideal gas constant?

Ideal gas constant. The gas constant (symbol R) is also called the molar or universal constant. It is used in many fundamental equations such as the ideal gas law. The value of this constant is 8.3144598 J/(mol * K).

How does the eudiometer work on solubility of NO2?

The eudiometer functions on the greater solubility of NO2 over NO, and the reaction 2 NO + O2 → 2 NO2. A quantity of air is combined with NO over water, and the more soluble compound dissolves, leaving the remaining air somewhat contracted in volume. The richer the air was in oxygen, the greater the contraction.