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Catalyst

Catalyst. C alculators and periodic tables today!. Today’s Agenda. Objective. Performance Indicator: Distinguish among elements, compounds, and mixtures. Practice test #25. Elements and Compounds. Where do you find all the elements? Periodic table

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Catalyst

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Presentation Transcript

  1. Catalyst Calculators and periodic tables today!

  2. Today’s Agenda

  3. Objective • Performance Indicator: Distinguish among elements, compounds, and mixtures. • Practice test #25

  4. Elements and Compounds • Where do you find all the elements? • Periodic table • What do you have to do to form a compound? • Bond together two or more elements

  5. Mixtures • A mixture is a mix of elements, compounds, or both that are not chemically bonded together • Homogeneous vs. heterogeneous?

  6. Today’s Agenda

  7. Objective • Performance Indicator: Identify properties of a solution: solute and solvent in a solid, liquid or gaseous solution: procedure to make or determine the concentration of a solution in units of ppm, ppb, molarity, percent composition, factors that affect the rate of solution. • Practice test #26-29

  8. MOLARITY M= Moles of solute Liters of solution Change mL to L by moving the decimal point three times! Concentration is commonly measured by chemists using Molarity: the number of moles of solute per liter of solution

  9. EXAMPLES • Suppose that 0.30 mol KBr are present in 0.40L of solution. What is the molarity of the solution? • Ms. Myers makes 7.5 L of a 6 M NaOH solution. How many moles of NaOH did she use? • How many grams of BeCl2 would be needed to make 1 L of a 5.0 M BeCl2 solution? • Why is grams underlined?

  10. Today’s Agenda

  11. Exit Slip

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