Why the method using mass loss on the balance gives more accurate results?
Table of Contents
- 1 Why the method using mass loss on the balance gives more accurate results?
- 2 Why is it better to use a gas syringe?
- 3 Why does the volume affect the rate of gas production or use?
- 4 Why is gas syringe better than measuring cylinder?
- 5 Why is a syringe more accurate than a measuring cylinder?
- 6 What is used to measure the volume of gas?
- 7 Why does volume affect rate of reaction?
- 8 How is gas volume measured?
Why the method using mass loss on the balance gives more accurate results?
Mass loss. Allowing the gas to escape and simply measuring the mass loss is a more accurate method. The cotton wool “bung” is important as it allows gas out but traps any tiny droplets of water that might otherwise be thrown through the mouth of the conical flask when bubbles burst.
Why is it better to use a gas syringe?
gas syringe has a precise scale, gas jar does not. tube beneath the trough may slip away from under the gas jar.
What is the best way to measure the gas produced in a chemical reaction?
The volume of gas produced during a chemical reaction can be measured by collecting the gas in an inverted container filled with water. The gas forces water out of the container, and the volume of liquid displaced is a measure of the volume of gas.
Why does the volume affect the rate of gas production or use?
When there is a decrease in volume, the equilibrium will shift to favor the direction that produces fewer moles of gas. When there is an increase in volume, the equilibrium will shift to favor the direction that produces more moles of gas.
Why is gas syringe better than measuring cylinder?
Gas syringes, though slightly expensive, are leak-proof and (if frictionless) will not pressurize the gases and thus will generate a much more accurate reading.
Why do all the reactions produce the same volume of gas?
He determined that if certain gases that are products and reactions in a chemical reaction are measured at the same conditions, temperature and pressure, then the volume of gas consumed/produced is equal to the ratio between the gases or the ratio of the coefficients.
Why is a syringe more accurate than a measuring cylinder?
Syringes may be used to deliver a wide range of liquid volumes with a high degree of accuracy. They are especially useful for measuring and delivering viscous liquids….
| Volume of Water Delivered by Graduate Cylinder and Plastic Syringe | ||
|---|---|---|
| 10.0 | – | 9.98 .02 |
What is used to measure the volume of gas?
the volume of a gas is usually measured with a gas syringe (or sometimes with an upside-down measuring cylinder)
Why does the volume of gas increase most quickly at the start of a reaction?
This is largely to do with how much of the reactants are present. As a result there will be more successful collisions between the reactant particles. The more successful collisions, the faster the reaction will be.
Why does volume affect rate of reaction?
Pressure. Under higher pressure or at a higher concentration, gas molecules collide more frequently and react at a faster rate. Conversely, increasing the volume of a gas decreases pressure which in turn decreases the collision frequency and thus reduces the reaction rate.
How is gas volume measured?
Gas is sometimes measured in cubic feet at a temperature of 60 degrees Fahrenheit and an atmospheric pressure of 14.7 pounds per square inch. Gas production from wells is discussed in terms of thousands or millions of cubic feet (Mcf and MMcf). Resources and reserves are calculated in trillions of cubic feet (Tcf).
Does volume affect rate of reaction?
Under higher pressure or at a higher concentration, gas molecules collide more frequently and react at a faster rate. Conversely, increasing the volume of a gas decreases pressure which in turn decreases the collision frequency and thus reduces the reaction rate.