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Substances in some mixtures can be separated by physical means.
As you read in Chapter 11, you can separate salt and pepper because
they have different physical properties. Substances may also have
different chemical properties that can be used to separate them from
one another.Scientists who study dinosaur fossils and other fossils use chemical
properties to separate mixtures. Fossils are often scattered throughout
limestone. It can be difficult to chip limestone off a fossil without
damaging the fossil. However, limestone can be dissolved by vinegar.
A bubbling reaction occurs. Fossils, which are made of a different kind
of rock, do not react with vinegar as quickly. So scientists sometimes
use vinegar or similar chemicals to separate fossils from rock.Separating Metals from OresOres are rocks that include metals combined with other substances.
People rely on chemistry to release metals from their ores. For example,
iron ore contains iron oxide. Heating iron ore in a hot furnace with solid
carbon allows the iron to separate from the oxygen in the ore. The resultThe fossil does not
react quickly with
vinegar, but the
limestone around
the fossil does.
What evidence of
this reaction can
you detect?is pure iron and carbon
dioxide. This process
works because iron has
the chemical property of
bonding to oxygen less
strongly than to carbon.In this blast furnace, iron is separated from iron ore. The process relies on the different chemical properties of the substances heated here
What else can I help you with?
What do you call the useful chemicals you get from food?
Proteins are useful chemicals that you obtain from food.
How do you recover useful chemicals?
For each useful and expensive chemical a specific method exist.
What is only useful when broken?
A glow stick is only useful when it is broken, as this allows the chemicals inside to mix and produce light.
What is used as a source of antibiotics?
Many plants proved useful for this purpose.along with chemicals.
Can chemicals harm your system salt water?
Your question is not at all clear. It would be useful to know what system you are talking about, what chemicals you are concerned about, and what salt water has to do with this. But in general, chemicals can harm systems. Some chemicals are quite dangerous.
How do chemicals stains light microscopes more useful?
Chemical stains make light microscopes more useful by showing specific structures in a cell.
How a chemical is useful?
This depends on which chemical you are referring to because different chemicals are beneficial in there own ways.
What is a gas that is both harmful and useful?
Gas has chemicals in it so it well affect you're lungs
When is a bike more useful than a car?
It's also useful in the summer time it's good for exercise and less "bad" chemicals going into the air
Why is a chemist important to a human being?
Chemists see whether chemicals are harmless, harmful, lethal, or what they are useful for.
What does the hazchem code do?
classify dangerous chemicals,very useful if there's an accident-you can see them on the back of petrol tankers.
What is the meaning of harmful and useful materials?
Harmful materials are substances that can cause damage to living organisms or the environment, such as toxic chemicals or pollutants. Useful materials are substances that have practical value or serve a useful purpose, like building materials or medicine.
