Semester 1 Review. Semester 1 Review U N I T 1 M E A S U R E M E N T S A N D D E N S I T Y UNI T 1 D I M E N S I O N A L A N A L Y S I S

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1 South Pasadena Chemistry Name Period Date U N T 1 M E A S U R E M E N T S A N D D E N S T Y The following measurements were taken of a rectangular block of an unknown metal. Electronic balance reading (in g): Write this measurement in scientific notation: g Length, width, and height of the block. Write your measurements cm 4.32 cm 1.00 cm Calculate the density of the block in g/cm 3, recording your answer with the correct significant figures. V = l w h = (5.45 cm)(4.32 cm)(1.00 cm) = 23.5 cm 3 m = g D = m V = g 23.5 cm 3 = 8.71 g/cm 3 Which of the following could be the unknown metal? Aluminum d = 2.70 g/cm 3 Copper d = 8.94 g/cm 3 Gold d = g/cm 3 Silver d = g/cm 3 Calculate the Percent Error of your calculated density. calculated accepted % error = 100% accepted = 8.71 g/cm g/cm g/cm 3 100% = 2.6% Does the percent error describe the accuracy or precision of your calculated value? Explain briefly. % error describes accuracy because it tells you how far your value is to the actual/accepted value. Perform the following conversions. Show all your work. UN T 1 D M E N S O N A L A N A L Y S S 3.1 wks =? min 3.1 weeks 7 days 1 week 24 hours 1 day 60 min = 31,248 min 1 hour dl =? L dl 1 L 10 dl = L 208 cm 3 =? in 3 (1 inch = 2.54 cm) 208 cm 3 1 in 2.54 cm 1 in 2.54 cm 1 in = 12.7 in cm 12.6 m =? km 12.6 m 1 km = km 1000 m 1.4 m/s =? km/h 1.4 m s 1 km 1000 m 60 s 1 min 60 min = 5.04 km/h 1 hr 20 C =? K K = C = ( 20 C) = 253 K

2 Complete the following table: Atomic sotope Number Mass Number protons U N T 2 E L E M E N T S neutrons electrons Net Charge 37 Cl Ca Fe Classify each element above as: hydrogen, alkali metal, alkaline earth metal, transition metal, inner-transition metal, other metal, non-metal, halogen, noble gas Cl is halogen, Ca is alkaline earth metal, Fe is transition metal List the seven diatomic elements: 2, N 2, O 2, F 2, Cl 2, 2, 2 Consider the compound Ba(NO 3) 2. Classify: [ onic Covalent Acid Organic ] U N T 2 C O M P O U N D S Consider the compound N 2O 5. Classify: [ onic Covalent Acid Organic ] Name the compound: barium nitrate Name the compound: dinitrogen pentoxide Calculate the Molar Mass. Ba: = N: = O: = Molar Mass: = g/mol Calculate the percent O in Ba(NO 3) 2. %O = g 100%= 36.73% O g What is the mass of 0.46 mol Ba(NO 3) mol g = 120 g 1 mol Calculate the Molar Mass. N: = O: = Molar Mass: = g/mol Calculate the percent O in N 2O 5. %O = g 100% = 74.06% g ow many molecules of N 2O 5 are in a 19.5 L sample at STP? 19.5 L 1 mol 22.4 L molecules 1 mol = molecules

3 U N T 3 N A M N G O R G A N C C O M P O U N D S Fill in this chart of formulas and names of hydrocarbons: C 3 8 C918 C 5 10 C614 C 4 6 propane nonene Pentene hexane butyne Draw the molecule for 2,3,3-trimethyloctane. C3 C3 What is the name of this hydrocarbon? C C C 3 3-methylhexane Name the following compound: C C C 1,1-dibromopropane Draw all the isomers for the compound on the left. (There are three.) U N T 3 F U N C T O N A L G R O U P S Label these pictures with the type of functional group: Aldehyde Ether Ester Alcohol Carboxylic acid Ketone Look at the carboxylic acid and the alcohol molecules. (1) Label these two molecules as alcohol and carboxylic acid. (2) Draw a BOX around the atoms that will form 2O. (3) Draw the products that form. (4) When they react, they form an. O carboxylic acid alcohol C C O C C ester + O

4 U N T 4 N A M N G C O M P O U N D S Classify each compound as onic (), Covalent (C), or Acid (A). Write the names or formulas for each compound. Name Type Formula Name Type Formula Calcium chlorate ydrochloric acid Stannic dichromate A Ca 2+ ClO 3 Ca(ClO 3) 2 + Cl Cl Sn 4+ Cr 2O 7 2 Sn(Cr 2O 7) 2 Phosphorus pentachloride C PCl 5 Ammonium sulfide (N 4) 2S Ferrous phosphate iron() phosphate Fe 3(PO 4) 2 Dinitrogen monoxide C N 2O Carbonic acid A 2CO 3 Lead acetate Pb 2+ C 2 3O 2 Pb(C 2 3O 2) 2 Sodium sulfate Na 2SO 4 U N T 4 C O N C E N T R A T O N S Consider a solution of Ba(O) 2. Show your work for each of the following. Calculate the concentration when 0.25 mol Ba(O) 2 is used to prepare a 120 ml solution. n = 0.25 mol V = L M =? M = n 0.25 mol = V L = 2.1 M Calculate the volume of a 1.20 M solution if g Ba(O) 2 is dissolved. MM = 1(137.33) + 2(16.00) + 2(1.008) = g/mol n = g 1 mol = mol g V =? M = 1.20 M V = n mol = M 1.20 M = L ow many ml of a 3.0 M Ba(O) 2 solution is required to prepare a 40.0 ml sample of 0.20 M solution? M conc = 3.0 M V conc =? ml M dil = 0.20 M V dil = 40.0 ml = L M conc V conc = M dil V dil (3.0 M)(V conc) = (0.20 M)( L) V conc = L = 2.67 ml Write the equation for how Ba(O) 2 dissolves in water. Ba(O) 2 Ba O (Strong base)

5 U N T 4 A C D S / B A S E S Match the terms with the following statements. Each term may be used once, more than once, or not at all. a) acid b) base c) both acid and base d) neither acid nor base A 1. p = 5 B 2. tastes bitter C 3. electrolyte A 4. vinegar, C 2 3O 2 B 5. increases [O ] A 6. neutralizes NaO B 7. feel slippery D 8. Na 2SO 4 B 9. milk of magnesia, Mg(O) 2 B 10. alkaline A 11. tastes sour B 12. turns cabbage juice blue, green, or yellow B 13. household ammonia D 14. p = 7 C 15. can burn your skin B 16. high p A 1.0 x 10-4 M solution of Cl has a p of 4.00 and a po of

Semester 2 Review U N I T 6 C O M P O U N D S U N I T 6 N A M I N G C O M P O U N D S. South Pasadena Chemistry Semester 2 Review Period Date

Semester 2 Review U N I T 6 C O M P O U N D S U N I T 6 N A M I N G C O M P O U N D S. South Pasadena Chemistry Semester 2 Review Period Date South Pasadena Chemistry Name Period Date U N I T 6 C O M P O U N D S Consider the compound Ba(NO 3) 2. Classify: [ Ionic Covalent Acid Organic ] Name the compound: barium nitrate Calculate the Molar Mass.