Warm Ups 2016-2017

Layout of Your Warm ups Number each Warm Up No more than two Warm-ups per page Include the problem and the answer Show all work for math problems

1 If you have been heating glassware, how should you pick it up? What do you do if there is an accident in the lab? Long hair should always be ___________ ________ in the laboratory. Never leave a lit Bunsen burner __________. _________________ shoes are recommended in the lab.

2 When should you wear goggles in the lab? If a chemical splashes on your skin, what should you do? What should you do with unused chemicals? How should you handle glass that you have been heating? Should all chemicals be considered dangerous in the lab?

3 explain what went wrong in these lab situations Diana and Mike were going to be late to their next class. After rushing to put away a few materials, they left the rest of the materials on the lab table. The teacher was not in the room yet. Jake began weighing chemicals, touching them with his hands. His nose itched, so he rubbed it. Cindy broke a test tube. Carefully she picked up pieces with one hand and placed them in her other hand. Then she dumped the glass pieces into the wastebasket.

4 label each as a chemical or physical change Liquid water freezing Gasoline burning Cooking an egg If 2 clear liquids are mixed and small clumps fall to the bottom of the container. A cube of orange colored sugar is dissolved into water resulting in an orange liquid.

Lab directions Follow all directions Finish on time – if you are done early, clean up and work on lab questions Leave your lab area exactly as you found it! Homework is on the front desk – just do the front page

5 Make 2 qualitative observations about the picture.

6 List the 3 of the 6 state changes. How do you change matter from one state to another? Is changing states a physical or chemical change?

7 A Bunsen burner mixes what two substances together? What colors are a gas flame? What laboratory tool is used to light a Bunsen burner? Name 2 branches of Chemistry.

8 Sketch the heating curve of water. Label all the state changes. Where are there two states coexisting?

9 What happens to temperature as a substance changes from one state to another? Temperature is the measure of ________________. What is the difference between an element and a compound? Compare homogeneous and heterogeneous mixtures.

10 What types of mixtures exhibit the Tyndall effect? What are the two main types of heterogeneous mixtures? What part of a solution is the solvent? What is an alloy? Why is water considered the “universal solvent”?

11 What is the solubility of KCl at 60o C? If you have 130 g of KNO3 at 40o C is it saturated, unsaturated, or supersaturated? If you start with a saturated solution of NaCl at 50o C and then cool it to 20o C, how much material will precipitate out?

12 Determine whether the following are chemical or physical changes: What is the main factor used to distinguish between the different kinds of mixtures? Determine whether the following are chemical or physical changes: Paper burning Paper tearing A metal and gas combining to form a white crystal Water boiling CO2 subliming to form a gas Sugar dissolving in water

13 List 5 physical and 5 chemical properties of water. Using your qualitative observation skills, name 5 ways to determine the difference between a banana and a ham sandwich. Try to think of properties that can be used to tell any banana from any ham sandwich.

14 Classify each of the following as a(n): element, compound, homogeneous mixture, heterogeneous mixture Oatmeal Silicon dioxide Lemonade Chicken noodle soup Xenon Carbon monoxide Salt water

When you finish your lab Turn off your Hot Plate (do NOT get rid of the Zn and ZnCl2) Clean up your lab space and finish your lab questions Study for your test (retake tickets!)

15 Classify each of the following as a physical or chemical change Salt dissolves in water Grass grows A nail rusts A rock is split Determine the state change Water is placed out in winter (up north) Ice forms on the outside a liquid nitrogen container What is KMT?

16 how many significant figures in each of the following? 8.01 80.1 80 8001 0.0081

17 How many significant figures do the following number have: 0.004 3.854 5004 56.02 58.00 100.0 1000

18 perform the operation and answer with the correct significant digits 4.328 + 234.8 = 4.328 x 234.8 =

19 use dimensional analysis to solve 14 centuries to years $3.50 to quarters 900 cm to meters

20 convert the following 104 km = _______ m 198 g = _______ kg 6.3 cm = _____ mm 45oC = _____

21 How many grams in 1 mol of the following: Ga Pt Ba How many moles in the following 102.91g of Rh 265.82g Cs 8.00g O

22 6.95 x 1023 atoms Zn  g 2.99 moles Li  g 8.94 moles N  atoms

23 6.34 mol Sr  atoms 9.04 g H  atoms What is the density of an object that has a mass of 8.56 g and a volume of 5.234 mL? What is the mass of an object that has a density of 56.23 g/cm3 and a volume of 3.25 cm3?

24 How many significant figures? 90.001 Round to 3 significant figures – 65434.23 Calculate. Show the intermediate steps. (7.843 x 6.34) + 43.23 = Convert using dimensional analysis: 143.2m  in Convert  364K = oC A  piece of wood that measures 3.0 cm by  6.0 cm by 4.0 cm has a mass of 80.0 grams. What is the density of the wood? Would the piece of wood float in water?  (volume = L x W x H)

When you are finished with your quiz Make sure you have included your version on your paper! Turn in your quiz Get a Test Review and a Lab paper Begin the lab If you have time, find the density of multiple samples. Please return each sample you have measured to the box in the front of the room as you are finished.

25 How many grams does 0.500 moles of Br weigh? If a doctor finds that his patient has a mass of 65 kilograms, how heavy is the patient in grams? How many weeks are there in 34 hours? How hot is 4500 C in Kelvin? 349 cm + 1.10 cm + 100 cm =

26 Who was the first person to describe “atoms”? Name 3 more scientists who added to Atomic Theory. Describe “plum pudding” model of the atom and how it was developed. Who discovered the nucleus? What experiment did he use?

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29 A radio station broadcasts at a frequency of 5.90 x 105 Hz. What is the wavelength of the radio waves? Electrons have properties of both _____ and _____. Wavelength and frequency are _____ related.

30 What is average atomic mass of Lithium if 7.42% exists as 6Li (6.015 amu) and 92.58% exists as 7Li (7.016 amu)? _____ was the first person to suggest the existence of atmos. The law of conservation of mass states that mass is not ____ nor ____ in chemical reactions. There are ____ postulates to Dalton’s Atomic Theory. ____ discovered the electron. _____discovered the nucleus.

31 Magnesium occurs in nature in three isotopic forms: 24Mg (78.70% abundance) 23.985 amu 26Mg (11.17% abundance) 25.983 amu 25Mg (10.13% abundance) 24.986 amu Calculate the atomic mass of Magnesium from this data

32 Calculate the energy of light that has a frequency of 1.5 x 1015 Hz. A photon has the energy of 1.78 x 10-27 J, calculate its frequency.

33 What is the Orbital Configuration of: C P Zn As

34 What is the Electron Configuration of: C P Zn As

35 What is the Nobel Gas Configuration of: C P Zn As

36 The _______ ______ number gives the main energy level. The ______ ______ number gives the shape of the sublevel. The ________ number gives the orientation around the nucleus. The _____ number gives the direction an electron is traveling. Complete the electron configuration of S using orbital notation.

37 What is the difference between Meneleev’s Periodic Table and modern Periodic Table? What are three patterns that occur through the PT? What is the Octet rule and what are valence electrons? Name the major groups of the PT

38 Explain Hund’s rule. Explain the Aufbau principle. Explain the Pauli Exclusion principle. How many electrons are in an atom with ending electron configuration 4d6? What element has an electron configuration that ends in 3p5?

39 __________ is the father of the modern periodic table. The original periodic table was arranged by atomic ________. What parts of Dalton’s theory were proven false? How many p+, n0, and e- in 34S-2?