A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used to separate the two liquids?(1 point)

Question

Responses

collecting one of the liquids with a spoon
collecting one of the liquids with a spoon

waiting for the two liquids to separate
waiting for the two liquids to separate

heating the liquids and letting one boil away first
heating the liquids and letting one boil away first

passing the liquids through a filter to collect one of them

Which property could allow a student to easily separate sand and iron filings?(1 point)
Responses

melting point
melting point

boiling point
boiling point

magnetism
magnetism

solubility

You are worried that a solid substance has dissolved in a beaker of water in a lab. What would be a way to separate the substance from the water?(1 point)
Responses

Use a magnet to draw out the solid substance from the water.
Use a magnet to draw out the solid substance from the water.

Pour the liquid along a rough surface that would catch the solid particles but not the water.
Pour the liquid along a rough surface that would catch the solid particles but not the water.

Pass the solution through a filter to let the dissolved substance separate.
Pass the solution through a filter to let the dissolved substance separate.

Boil the water away, leaving the substance behind in the beaker.
Boil the water away, leaving the substance behind in the beaker.

A beaker contains a mixture of sand and salt. A student adds water to dissolve the salt. Which processes can be used to separate out the sand and salt?(1 point)
Responses

filtration to collect both the sand and the salt
filtration to collect both the sand and the salt

distillation to collect the sand and filtration to collect the salt
distillation to collect the sand and filtration to collect the salt

distillation to collect both the sand and the salt
distillation to collect both the sand and the salt

filtration to collect the sand and distillation to collect the salt

Answer 1

Here are the best responses to each of the questions:

1. A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used to separate the two liquids?

   • heating the liquids and letting one boil away first (This method is effective if the substances have different boiling points.)

2. Which property could allow a student to easily separate sand and iron filings?

   • magnetism (Iron filings can be attracted to a magnet, allowing for easy separation from sand.)

3. You are worried that a solid substance has dissolved in a beaker of water in a lab. What would be a way to separate the substance from the water?

   • Boil the water away, leaving the substance behind in the beaker. (This method works if the solid is non-volatile and does not dissolve in the water.)

4. A beaker contains a mixture of sand and salt. A student adds water to dissolve the salt. Which processes can be used to separate out the sand and salt?

   • filtration to collect the sand and distillation to collect the salt (Filtration separates the sand, and distillation can be used to recover the dissolved salt from the saltwater solution.)

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