difference between homogeneous mixture and heterogeneous mixture

1. Physical
sciences grade
10
mixtures
Your reward depends on what you do
by Mr V DUNGWA

2. Lesson objectives
– At the end of the lesson learners should be able to:
– Define mixture
– State the classification of matter
– Define homogeneous mixture and heterogeneous mixture
– Provide examples of homogeneous and heterogeneous mixture

3. Definition of a mixtures
A mixture is a combination of two or more substances, where these substances
are not bonded (or joined) to each other and no chemical reaction occurs between
the substances.
Of which these two substances can bond together to form a new product
Or can bond together and form no new product

4. Mixture classification
– Mixture can be classified as homogeneous mixture or heterogeneous mixture
depending on types of substances added together
– Homogenous mixture is when two substances are added and new product is
formed, that means the composition changes
– While heterogeneous mixture is when two substances are added and new
product is NOT formed, that means composition remains the same
– By composition we mean what makes up the substances (the identity of
elements)

5. Examples of homogeneous
mixture
1) When sugar is combined with water
– Water + sugar → 𝑛𝑒𝑤 𝑝𝑟𝑜𝑑𝑢𝑐𝑡 𝑓𝑜𝑟𝑚𝑒𝑑
– This new product is a generally known as sugar water
2) salt dissolving in water
water + salt → new product formed
this new product is generally known as salt water
provide other examples you know of homogeneous mixture?

6. Examples of heterogeneous
mixture
– 1) salt combined with water
– Salt + Stones → 𝑛𝑜 𝑛𝑒𝑤 𝑝𝑟𝑜𝑑𝑢𝑐𝑡 𝑓𝑜𝑟𝑚𝑒𝑑
– salt + Stones → 𝑠𝑎𝑙𝑡 + 𝑠𝑡𝑜𝑛𝑒𝑠
– Since no new product formed this mixture is known as heterogeneous mixture
– 2) Sugar + Salt → 𝑛𝑜 𝑛𝑒𝑤 𝑝𝑟𝑜duct formed
– Since no new product formed this mixture is known as heterogeneous mixture
– Provide other types of heterogeneous mixtures you know?

7. Your turn
1) Make your own mixtures by choosing any two substances from
– sand
– water
– stones
– cereal
– salt
– sugar
2) Try to make as many different mixtures as possible. Classify each mixture and give a
reason for your choice

8. Home activity
complete the following table
Substance
Non-mixture or
mixture
Heterogeneous
mixture
Homogeneous
mixture
tap water
brass (an alloy of
copper and zinc)
concrete
aluminium foil (tinfoil)
Coca Cola
soapy water
black tea
sugar water
baby milk formula
Complete the following table:

9. Reference
– Chris. F. (2010). Mictures and solution available at
https://www.slideshare.net/cfoltz/physical-science-33-mixtures?qid=e9a93029-
c1a1-419a-b8f0-0accf9d9f265&v=&b=&from_search=1
– Jahnkea. P. (2010) , mixtures and solutions, available at
https://www.slideshare.net/jahnkea/mixtures-and-solutions-3798361
– Summerhenser (2014). Mixtures and solutions PPT available at
https://www.slideshare.net/sammenheuser/mixtures-solutions-ppt