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Unit 2 Chemistry

Unit 2 Chemistry. Naming Compounds. Ionic bonds. What is an ionic bond? Quick rule: never use capital letters when writing names. Why name compounds?. So we know what is in products and what could be dangerous Compounds found at home = chemical names Bleach = sodium hypochlorite

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Unit 2 Chemistry

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  1. Unit 2 Chemistry Naming Compounds

  2. Ionic bonds • What is an ionic bond? • Quick rule: never use capital letters when writing names

  3. Why name compounds? • So we know what is in products and what could be dangerous • Compounds found at home = chemical names • Bleach = sodium hypochlorite • Baking soda = sodium bicarbonate • Antifreeze = ethylene glycol • Table salt = sodium chloride • Vinegar = acetic acid • Nail polish remover = acetone Glass cleaner = ammonia Toothpaste = sodium fluoride

  4. Ionic Bond naming • An ionic bond is between a metal and non-metal • First write the cation (metal) first and do not change the name at all • Then write the anion (non-metal) second but add the suffix –ide to the name • Ex oxide, carbide, hydride, sulfide, chloride

  5. Examples • NaCl- • sodium chloride • LiBr- • lithium bromide • K2O- • potassium oxide • BeF2- • beryilliumflouride

  6. Ionic bonds with polynomials • If there are more than two elements in the bond then one is a polynomial • The polynomial is almost always the anion except for NH4- ammonia • First write the metal name unchanged • Next write the polynomial name unchanged • You find the names of polynomials from the back of the table

  7. Examples • NaOH- • sodium hydroxide • CaCO3- • calcium carbonate • MgNO3- • magnesium nitrate

  8. Easy right? • some metals have more than one charge making it more complicated • Ex: Fe can have +3 or +2 Mn can have +2 or +4 V can have +5 or +4

  9. When a metal has more than one charge you need to determine what the charge is: • Ex iron and oxygen can be FeO or Fe2O3

  10. Finding charges • Find what the negative charge is and then the positive charge has to be equal to that • FeO- O is -2 so Fe has to be +2 • Put the charge of the metal in roman numerals right after the metal • iron (II) oxide

  11. Fe2O3- oxygen is -2*3= -6 so the cations add up to +6 • Since there are 2 Fe, each one would be +3 (+6/2) • iron (III) oxide • CuCl- Cl=-1 so Cu must be +1 • copper (I) chloride

  12. Examples • V2O5- O=-2*5=-10 • V= +10/2= +5 • vandium (V) oxide

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