Element, Compound, Mixture review

3 classes of matter Elements Compounds Mixtures

3 classes of matter Elements made of one type of atom pure Compounds made of two or more different types of atoms CHEMICALLY combined/bonded together Can be separated by CHEMICAL REACTIONS Mixtures physical combinations of different substances can be separated by exploiting the different physical properties of different components of the mixture.

Identify the element, compound & mixture

Identify the element, compound & mixture H2O salad C6H12O6 Fe Salt Water Alloys

Identify the element, compound & mixture H2O compound salad mixture C6H12O6 compound H2 element Salt Water mixture Alloys mixture

Types of Mixtures Homogeneous Heterogeneous Sort the descriptions looks like one substance can identify different components solution air brass soil

Types of Mixtures Homogeneous Heterogeneous looks like one substance can identify different components solution soil air brass

What type of mixture is this?

Coffee is a(n) Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

Coffee is a(n) Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

Sulfuric Acid (H2SO4) is a(n) Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

Sulfuric Acid (H2SO4) is a(n) Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

Iron (Fe) is a(n) Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

Iron (Fe) is a(n) Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

The best example of a solution is: Baking Soda (NaHCO3) Coca cola Chex mix Iron filings (Fe)

The best example of a solution is: Baking Soda (NaHCO3) Coca cola Chex mix Iron filings (Fe)

How to read a formula 2H2O 2NaOH 8H2 4Ag O2 8H2SO4 What are the subscripts for each of the following formulas? What if an element doesn’t have a subscript? What information does the subscript tell you?

How to read a formula 2H2O 2NaOH 8H2 4Ag O2 8H2SO4 What are the subscripts for each of the following formulas? What if an element doesn’t have a subscript? We assume it’s a “1” 2H2O1 2Na1O1H1 What information does the subscript tell you? The number of atoms of each element in a molecule.

Before balancing an equation, you need to know how to read a formula 2NaOH 8H2 4Ag O2  8H2SO4 What are the coefficients for each of the following formulas? What if a reactant doesn’t have a coefficient? What information does the coefficient tell you?

Before balancing an equation, you need to know how to read a formula 2NaOH 8H2 4Ag O2  8H2SO4 What are the coefficients for each of the following formulas? What if a reactant doesn’t have a coefficient? Then we assume it is a “1” e) 1O2  What information does the coefficient tell you? How many molecules of a reactant are present in a reaction

What is a pure substance?

What is a pure substance? Pure substances are made of only one type of substance. Elements and compounds are pure substances. Every particle of an element or a compound is identical…..PURE! Mixtures are not pure, they are physical combinations of different elements and compounds.

How do you break down an… Element? Compound? Mixture?

How do you break down an… Element? you can’t break an element into simpler parts using natural processes. Compound? compounds are broken into simpler parts through chemical reactions H2O  H2 + O2 Mixture? because they are physically combined, you can use the physical properties of different components to separate the parts of a mixture.

Processes used to separate mixtures: sifting – uses differences in size to separate components filtering – uses very small pores in the filter to separate components. Frequently used in conjunction with solubility distillation – evaporation and condensation of different parts of a mixture. Differences in boiling points are exploited. Physical properties used: magnetism – to separate iron filings solubility melting & boiling points