tri 2 exam rev

exam tips:

1. Prepare, and don't worry. You will do better with a good night's sleep.

2. Work quickly through the exam, circle on test the questions you want to come back to, but put an answer in the first time.

3. Do all of the on paper questions; you will get some points for just trying

4. Say a prayer before you study.

this review will probably have to be adjusted a little once we are closer to the end; Must be written, not typed; turn in before the exam.

TRIMESTER 2 EXAM REVIEW HANDED IN THE DAY OF THE EXAM before the exam; DEFINE/EXPLAIN/OR GIVE EXAMPLE OF THE TERMS; SOLVE THE PROBLEMS. THE EXAM IS 3 PARTS; MC ON terms and problems below(25%); TF ON TERMS BELOW(25%); PROBLEMS/ ESSAYS(50%) LIKE SAMPLES BELOW. PLEASE DO IN YOUR HANDWRITING.

attach classwork beginning work from friday, feb 18

practice in balancing, classifying & stoichiometry & gases - see interactive chemistry links below; do these on separate paper; I am not checking screenshots (not optional)

1. classify chem reactions, just write classifications

2. 10 intermediate(regular) or 10 advanced (honors) from Balancing act ; you may just right coefficients

3. go to this link(all types) stoichiometry at least 10, your choice ! (regular can do 5)show da work!

4. cgl practice and igl practice ; at least 5 of each, show me written work to support answers

optional:

1. I also suggest going to 'videos' on my website, and watching some of the videos from semester two.

2. chemthinks - we did particle nature, and gas behavior

3. the balancing game

TERMS: (not optional) write these out:

Binary compounds, diatomic gases, polyatomic ions, oxidation numbers, hydrate/anhydrous, mole-mass/#atoms/molecules, empirical formulas, conservation of mass, chemical equations(states), reactants/products/catalysts, endothermic/exothermic, coefficients/subscripts, tests for hydrogen and oxygen, limiting/excess reactants, absolute 0, air pressure/altitude/barometer, pressure& temp units/ kinetic theory, changes of state/sublimation,etc, volatile, pressure-volume relationship for gases (Boyle's law), temperature-volume-pressure relationship in gases,combustion of a hydrocarbon, melting/freezing/boiling pts of water, formula mass, precipitate, activity series, %yield, molecular mass & diffusion/effusion rates, sublimation, the mole, distilled water, activation energy, avogadro's number, kelvin, endo/exothermic, STP, standard molar volume of gases, gas laws.. CGL (combined gas law), Ideal gas law, stoichometry, molarity, molality, sat, unsat, & supersat solutions, suspensions, colloid, solubility, phenolthalien

PROBLEMS/ESSAYS: (not optional)

Name - H₂SO₄, HCl, NO, AlPO₄, FeSO₄,BeF_2,

Give formulas – strontium nitrate, rubidium sulfide, cobalt (II) sulfate, carbonic acid, Nitrogen IV oxide

Convert - 3 mole MgO to g, 50g NH₃ to moles, 40g of water to molecules, 88g of carbon dioxide to Liters at STP

Name 5 types of chemical reactions

Write a balanced equation for the combustion of pentane ( C₅H₁₂).

What mass of carbon dioxide results from the combustion of 25g of pentane?

What mass of water would result from the combustion of 5moles of pentane?

How many moles of oxygen are needed to burn 50g of pentane?

How many Liters of carbon dioxide at STP are produced when 100 g of pentane burns?

How many liters of water vapor would be produced if an unlimited supply of pentane was burned in 100 Liters of oxygen?

What is the empirical formula of a compound that is 75% C and 25%H?

what is molecular formula if the molar mass is 48g

# molecules in 2 mole carbon dioxide

mass of 12 moles of hydrogen gas

56 g of carbon monoxide into moles

volume of 64g of methane at STP

Wrtie the balanced equation for the combustion of butane ( C4H₁₀) If 128g of oxygen and 88g of butane are present, what mass of water is formed? What volume of carbon dioxide at STP? .( R.chem, you don't have to do limiting reactant calculations, so substitute unlimited oxygen)

In this reaction, _____________ was the limiting reactant, and there are ___________g of excess reactant remaining.

calcium floride octahydrate was put into a drying oven. This data was obtained : The dish weighed 33.5g empty, 51.5g with the hydrate, and 37.0g after evaporation in the oven. Find the mass of hydrate , the mass of water, the mass of the annhydrous salt , the moles of annyhyrous calcium floride, and the experimental % of water in this hydrate. What is the formula of the hydrate? What is the actual % water in the hydate? Find % error.

sketch & label, hydrogen fuel cell kit; trace energy transfers. (see bottom of page)

prepare a notecard with formulas/ STP/ etc. that you can use during the test. USE MY notecard, put your name and pd by my initials; turn notecard in with your exam

at review ch10 graphs; time vs temp and phase change graphs

Collecting a gas over water or by water displacement. What does that mean? What is always mixed with the gas one is collecting if this method is used? a.review Butane Lab - calculations and conclusions; b. review Gas stoichiometry calculations and conclusions

organic chemistry, alcohols and hydrocarbons; write structural and molecular formulas for

methane, methanol; propane, propanol; octane, octanol ; butane, butanol

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solve igl for three R's;

atm, kpa & mmHg

1. volume of .0124moles of oxygen gas at 95Kpa and 80 degrees C

2. moles of 150mL of carbon dioxide at 3atm and 20 degrees C

3. pressure of 12g ammonia at 22 degrees C if its volume is 12000mL.

450 mL of gas at STP is changed to 50 degrees C and 900 mmHg. What is the new volume?

ch12&13 Solution Chemistry - see ch12&13 power point notes

Name a liquid miscible with water, and one immiscible with water; What determines miscibility ; What is the general name for solids formed in a reaction? Are they sol. or insoluble? What units are used to measure concentrations of solutions? terms; solute, solvent, solution; what is solvent in air? why?

1. *15mL of calcium floride solution was put into a drying oven. This data was obtained : The dish weighed 33.5g empty, 51.5g with the solution, and 37.0g after evaporation in the oven. Find the mass of solute, the mass of solvent, the moles of solute, and * the molarity and molality of the solution.

2. *Find % error of above, if the actual molarity is 3.2? __________________________________

Review of solutions

• 1. Fog, smoke, gels are examples of what type of heterogenous mixture?

  2. Name another type of heterogeneous mixture.

  3. What is the solvent in air? Why?

     1. Name 3 ways of increasing the rate of solution.

stop here feb 2022___________________________________

• 3. 2. How does adding solute affect bp of a solution? Mp?

     3. What type of solutions conduct electricity? Why?

        1. How does a temp inc affect a solid dissolving in liquid? A gas dissolving in liquid?

        2. How does a pressure inc affect a solid dissolving in liquid? A gas dissolving in liquid?

     4. making a solution: what mass of sodium chloride is needed to make 600mL of a 3.0M sodium chloride solution? what goes in volumetric flask first? what comes up to line?

__

Ch 14&15 acid and bases;

what ever we cover in class; attach what is done in class (a-b song answers, neutralization reactions from demos, notes on ph)

for reference ch14&15 rev and ch14&15 note acid&base; look at demos again; some of those questions are on the exam.

neutralization,

ch22 organic chemistry- Whatever we do in class may be on the test.

for reference ch22 organic chem notes and ch22 organic chem ws. substituted, hydrocarbons, alcohols,

organic chemistry: choose from methane, methanol, propanol, butane, propane, octane, ethanol for the following: 4 carbons, 3 carbons, in lighters, in Bunsen burners, fermented from fruits and grains, simplest alcohol, rubbing alcohol, gas grills, natural gas : Write Structural formulas for all the compounds above.

1. ___________March 2021 H chem stopped here

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h chem not covered 2013 or 2014, 2015, 2016, 2017, 2018, 2021: thermochemistry & nuclear chemistry, so don't do the part of the review below this line

_________________________________________________________

• 1. ionization, dissociation, indicators, pH, net ionic equation, spectator ions

     1. What does semi permeable mean?

        1. What is the term describing water moving across a semi permeable membrane?

        2. When molecules form ions in solutions __ has occurred, but when an ionic solid dissolves, __ is said to have occurred. Both have the same end product, _

Ch 14&15 acid and bases;

----- choose from these: saturated fat, unsaturated fat, esters for the following: single bonds, least healthy, fragrance and flavor, solid, vegetable oil, unsaturated fat + hydrogen, acid + alcohol = ?

ch16 THERMOCHEMISTRY – HEAT PROBLEMS: *show work

When 90g Cu was taken from a pot of boiling water and placed into 95mL of water at 20 degrees C, the temperature went to 25.2 degrees C.What was the final temperature of the metal? What was the change in temp of the metal?What was the change in temp of the water?What mass of water was used?*How much heat did the water gain?*What is the experimental Cp of the Cu? What is the actual Cp of the Cu? *What is the % error? What type of change in this lab? Evidence? Peanut lab: A cashew with a mass of 0.66g was burned, causing 94mL of water in the calorimeter to go from 19 degrees C to 52 degrees C. What was the change in temp of the water?*How much heat did the water gain?How much heat did the cashew lose? *How many calories/gram in the cashew? *The can says 28.2g serving has 180 Calories, what is the actual cal/g? *What is the percent error? Why was the actual greater than the experimental?

What type of change? Why?

ch21 nuclear chemistry:

choose from fission, fusion, both, neither for the following:

heavy element split, matter converted into energy, by products include radon, desired as future energy source, lighter elements combined, requires high temp, first nuclear bombs, occurs on the sun, requires critical mass, a lot of radioactivity, nucleus not involved, involves protons and neutrons