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Naming and Writing Chemical Formulas - Practice Problems and Tips

Learn how to name and write chemical formulas for different compounds, including transition metals. Practice problems and useful tips included.

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Naming and Writing Chemical Formulas - Practice Problems and Tips

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  1. Squares Activity • Make 16 different compounds • All the (+) ions and all (-) ions need to be the same type. • Write the formula. • Name the formula. • Write on your own paper!!

  2. 9.2 Names from formulas • How do you write a formula from a name? • Write the symbol and the charge for the first word. • Write the symbol and the charge for the second word. • Criss-cross to find the formula. • Sodium chloride NaCl

  3. 9.2 Names to formulas • Practice Problems • Calcium chloride • Aluminum hydroxide • Potassium phosphide • Magnesium sulfate • Ammonium nitrate

  4. 9.2 Transition Metals • What about transition metals? • Roman numerals = charge • Write the symbol and charge for the first word. • Write the symbol and charge for the second word. • Criss-cross to find the formula. • Iron (III) hydroxide

  5. 9.2 Transition Metals • Practice Problems • Chromium (II) bromide • Copper (II) phosphate • Cobalt (II) sulfate • Manganese (II) oxide • Copper (I) carbonate

  6. 9.2 Transitional Metals • What is the charge of transition metals? • CrCl2 • Put the charge on each anion • Add the charges together • Balance out the charge on the transition metal Cl Cr Cl

  7. 9.2 Transitional Metals • Practice Problems • OsBr3 • NiO • PdP • Cu2O3 • WS2

  8. 9.2 Transition Metals Transition Metals • Name of cation (name of the element) • Charge written in Roman Numerals • Name of anion (name of the element) with ide CuCl2 Name of cation + Roman Numeral charge Name of anion Chloride Copper (II) Copper(II) Chloride

  9. 9.2 Transitional Metals • Practice Problems • CuCl2 • CuN2 • Fe2O3 • FeS • CrCl2

  10. 9.2 Reverse! • Practice Problems • Ammonium phosphate 6. Magnesium hydroxide • Iron (II) oxide 7. Aluminum sulfate • Iron (III) oxide 8. Copper (II) sulfate • Calcium chloride 9. Lead (IV) chromate • Potassium nitrate 10. Gold (II) nitrate NiBr3 2. AuCl3 3. PbSO4

  11. 9.2 Reverse! • Exceptions • Roman numerals are needed to figure out the charge of a transition metal. There are two elements that will always have the same charge. • Zn = +2 • Ag = +1

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