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Chemistry. Semester 1 Review. Periodic Table. Writing formulas. List symbols and charges. Use subscripts to balance. Parentheses around polys!. Li +1. (SO 4 ) -2. 2. Li 2 (SO 4 ). Naming formulas. Monatomics end with -ide Add prefixes if two nonmetals Add Romans if transition metal.
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Chemistry Semester 1 Review
Writing formulas • List symbols and charges. • Use subscripts to balance. • Parentheses around polys! Li+1 (SO4)-2 2 Li2(SO4)
Naming formulas • Monatomics end with -ide • Add prefixes if two nonmetals • Add Romans if transition metal Ca(OH)2 Calcium Hydroxide
Br2I2N2Cl2H2O2F2 • Seven diatomic elements. • Need a subscript 2 if by themselves! Ex. Oxygen gas Chlorine gas, etc.
Factor label • FOLLOW the UNITS!! 24 years hours 24 years 365 days 24 hours = 1 years 1 days hours
Sig Digs! • Nonzeros COUNT • Sandwich rule 2002 • Leading zeros never count 0.00522 • Trailing zeroes count AFTER decimal 5.00 • Whole number zeroes count IF decimal shown 70. But Not 100
Scientific notation #.## x104 decimal after 1st nonzero number Put in calculator, NEVER HIT “X” or “10”!!! USE “EE” or “EXP” key
Practice 1) (6.02x1023)g / (2.75x1017mL) 2) (4.2x1012ft)*(1.00x102ft)
Periodic Table • Find charge by moving to OCTET Group 1, 2,17,18
Algebra • Arrow method • CIRCLE unknown • FLIP when crossing equal sign
Con’t P1V1 T1 P2V2 T2 = T2 = P2V2T1 P1V1
Polyatomic ions K.Y.I.!!!! Recognize Recall
Balancing • Use subscripts to balance FORMULAS!! • Use coefficients to balance EQUATIONS!!
Formulas • Write formulas for: • Sodium Fluoride • Copper (II) Nitrate (NO3-1) • Calcium Bromide • Aluminum Oxide • Ammonium Sulfate (NH4+1)(SO4-2)
Reaction types • A + X AX • AX A + X • A + BX AX + B • AX + BY AY + BX • ___ + O2 H20 + CO2
Reaction types • Complete and classify: • Oxygen reacts with propane(C3H8) • Sodium reacts with Magnesium Fluoride c) __ KCl+ __ Li2S __ LiCl + __ K2S
The End • Finish your Semester 1 Checkpoint assignment • Quiz next week (Net ionic equations) • Test Ch.11 TEST Next week • Next WEEBLY Ch.11, 12, 13, 14 Go Vikings!!