Topic: Chemistry Aim: Describe solubility and the different factors that affect it. Do Now: Elements, Compounds and Mixtures ISN HW: Finish ISN.

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Topic: Chemistry Aim: Describe solubility and the different factors that affect it. Do Now: Elements, Compounds and Mixtures ISN HW: Finish ISN

1.Describe the difference between a compound and a mixture. Compound: 2 or more elements CHEMICALLY COMBINED. Mixture: 2 or more substances PHYSICALLY COMBINED. 2. Identify and describe the two parts of a mixture. Solute: substance being dissolved Solvent: substance doing the dissolving

Solubility How well a solute dissolves

Dissolves in another substance –Ex: Salt and sugar dissolve in water Sugar water solution Salt water solution Soluble substance

Sugar water solution CANNOT dissolve in another substance Ex: oil Insoluble substance

Obviously NOT soluble in water!!!!

A lava lamp depends on the globs not being soluble. It also depends on the globs being about the same density as water. It took years to develop the right ingredients to make a lava lamp work.

Factors that affect solubility

1. Temperature: As temp of solvent increases, solubility of the solute increases

2. Particle size: the smaller the size, the greater the solubility powdered sugar sugar granules

3. Stirring: increases solubility

Let’s summarize… 1.Describe the term ‘solubility.’ 2.Describe the difference between a soluble and insoluble substance. 3.Describe at least three factors that can affect the solubility of a substance.

Review: Which statement is true regarding insoluble substances? 1.They can be easily dissolved in a solvent. 2.An example of an insoluble substance is ice tea dissolving in water. 3.Insoluble substances cannot dissolve in a solvent. 4.They can easily dissolve in a solute.

Which of the following is an example of a mixture of gases? 1.soft drink 2.air 3.oxygen 4.water

In sweetened tea, the sugar is called the 1.solute. 2.solvent. 3.colloid. 4.solution.

Which of the following would help sugar dissolve faster in water? 1.stirring, the water 2.decreasing the solubility of sugar 3.using larger particles of sugar 4.decreasing the water temperature

Which statement regarding mixtures is true? 1.Mixtures consist of substances held together with chemical bonds. 2.Mixtures cannot be separated. 3.Mixtures consist of substances that are not chemically combined. 4.Mixtures do not include solutions.

1. Matter is anything that has and takes up _______________. 2. An Atom is the smallest unit of. 3. Protons are the sub-atomic particles that have a ________ charge and are in the atom’s nucleus. 4. Neutrons are the sub-atomic particles that are ________ and are found in an atom’s nucleus. 5. Electrons have a __________ charge and are situated outside of the nucleus. 6. The Atomic Number is the number of ________. 7. An Element is a pure substance that is made of only ________ type of atom (e.g. gold, oxygen). 12. A Compound is a substance that is made of more than one _____________. mass space matter positive neutral negative protons one element