Diffusion in Solids Liquids and Gases
Chemistry ⇒ States of Matter
Diffusion in Solids Liquids and Gases starts at 8 and continues till grade 12.
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See sample questions for grade 10
A drop of ink is added to a beaker of water and spreads out evenly after some time. What process is responsible for this?
Calculate the relative rate of diffusion of hydrogen (molar mass = 2 g/mol) and oxygen (molar mass = 32 g/mol).
Describe how diffusion in solids can be demonstrated experimentally.
Explain why diffusion is important for living organisms.
Explain why diffusion is slower in solids than in liquids or gases.
In a laboratory experiment, a student observes that the smell of ammonia reaches the other end of the room in a few minutes. What does this observation indicate about the nature of gases?
State one everyday example of diffusion in gases.
When a crystal of potassium permanganate is placed in water, the color spreads throughout the water. What does this demonstrate?
Why does increasing the temperature increase the rate of diffusion?
A sealed glass tube contains a layer of copper sulfate crystals at one end and a layer of potassium dichromate crystals at the other, separated by a layer of gel. After several weeks, colored bands are observed in the gel between the two ends. Explain the process responsible for the formation of these bands and why it takes so long.
A student places a few drops of concentrated hydrochloric acid at one end of a long glass tube and a few drops of concentrated ammonia solution at the other end. After a few minutes, a white ring forms closer to the hydrochloric acid end. Explain why the ring forms closer to one end and what this demonstrates about diffusion in gases.
Arrange the following in order of increasing rate of diffusion: solids, liquids, gases. Explain your reasoning.
Explain why stirring a solution increases the rate of diffusion of a solute in a liquid.
If the rate of diffusion of gas A is twice that of gas B under identical conditions, what is the ratio of their molar masses (MA : MB)?
