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Chemical Rxns
Stoichiometry
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Acids and Bases
Calculations
100

Predict the products (chemical formula) of:
iron (III) + nickel (II) chlorate --> 

Fe(ClO3)3 + Ni 

100

What is the study of stoichiometry? 

the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers.


100

What are the 3 forces that affect solubility?

1) attraction (forces) of solute particles to each other 

2) attraction of solute particles to solvent particles

3) attraction of solvent particles to each other

100

What is the correct name for HI (aq)?

hydroiodic acid

100
What is the molar mass of chlorous acid? 

HClO2 --> 68.46 g/mol

200

Predict the products (chemical formulas) for: magnesium chloride + ammonium phosphate --> ? 

Mg3(PO4)2 + NH4Cl

200
How many molecules of H2O are in one mole of H2O? 

6.022 X 1023 molecules

200

Calculate the molar concentration for the following: 18.95 g of LiOH in 1.71 L

0.463 mol/L

200

What is the purpose of the pH scale?

To convert extremely tiny numbers (ie. concentration of H+ ions) into a "user-friendly" scale

200

Which compound has the greater percent composition of oxygen: CO2 or NO2?

CO2

300

What is the complete, balanced chemical equation for when solid zinc carbonate decomposes?

ZnCO3(s) -> ZnO(s) + CO2(g)

300

What is the molar mass of Al(OH)3? Round to two decimal places. 

78.01 g/mol

300

What volume of the stock solution is needed to make 325 mL of a 1.40 mol/L acid from a 8.00 mol/L stock solution?

56.9 mL (0.0569 L)

300

The amount of hydronium ions in tomato juice is 0.0001.  What is the pH of the juice?

pH = 4

300

a.   Balance the following chemical equation:

MoS2(S) + O2(g) -> MoO3(s) + SO2(g)

b.   What amount (in moles) of sulfur dioxide will be produced if 227.85 mol of oxygen are used in the process?

a. 2,7,2,4

b. 130.20 mol

400

Using the solubility guidelines, which of the following are solid products: 

(NH4)3PO4, AgBr, NH4F, MgCO3, Ca(NO3)2?

AgBr, MgCO3

400

Fe3O4 + 4 CO--->3 Fe + 4 CO2

How many moles of CO are needed to react with 

16.5 g of Fe3O4?

0.285 moles CO

400

225 mL of a 1.45 mol/L solution of sodium iodide is added to 175 mL of a 0.85 mol/L solution of lead(II) nitrate.

a.   Write the net ionic equation for the reaction.

b.   How many grams of solid precipitate will form in the process?

c.   Does the resulting solution still contain Na+ ions or I- ions?

a) Pb+2(aq) + 2I-1(aq) -> PbI2(s)

b) 66.27 g

c)  Since the iodide ions were in excess, there will still be iodide ions in solution.

400

What is the purpose of titration?

Titration is the slow addition of one solution of a known concentration (called a titrant) to a known volume of another solution of unknown concentration until the reaction reaches neutralization.  Then the unknown concentration can be calculated.

400

How many atoms of hydrogen (in water) are produced if 2 grams of liquid methane are completely burned (combustion)?

3 X 1023 atoms of hydrogen 

500

Which of the following will occur:
a) NaCl + AgNO3 -->
b) HClO3 + KOH --->
c) NH4ClO3 + K2O -->
d) Na2CO3 + AgClO3 --> 

a, b, d

500

How many litres of carbon dioxide gas is produced if 2L of carbonic acid decomposes at STP?  How particles is in the CO2 produced?

V =2L of CO2

N = 5.36x1022 particles of CO2

500

A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. The mass was reduced to 7.58 g. What is the name and formula of the hydrate?

Magnesium carbonate pentahydrate

MgCO3 · 5H2O

500

What volume of 0.55 mol/L sodium hydroxide is needed to neutralize 100 mL of a 6.50 mol/L  phosphoric acid solution? 

3.55 L

500

When potassium hydroxide reacts with phosphoric acid, potassium phosphate and water form. Suppose 6.26 mol of potassium hydroxide are reacted with 2.36 mol of phosphoric acid.  What is the limiting reagent?  What mass of water will form?

KOH

112.81 g