Chem 101 Ch. 4-6 Study Q's
How many grams of oxygen would form with 2.13 g of Mercury (II) oxide? Use the following equation: 2HgO (s)⇒ 2Hg (l) + O2(g)
0.0787 g O2
_N2 + _H2 --> _NH3
1, 3, 2
How many core electrons are in a chlorine atom? Hint see larger group number.
10
Using the equation for the Haber-Bosch process here : 4NH3 +3O2⇒2N2+ 6H2O How many liters of nitrogen gas would be produced if we start with 22.3 L of ammonia?
11.2
Using the equation for winemaking, let's go in the opposite direction and go from volume to mass. How many grams of glucose are needed to produce with 28.3 L of carbon dioxide?
114.0
C3H8 + 3O2 → 3CO2 + 4H2How many moles of oxygen are necessary to react completely with 4.0 moles of propane C3H8?
12 moles O2
1 cup flour + 2 eggs + 1/2 tsp baking powder ⇒5 pancakes How many pancakes can we make if we have 5 eggs?
12.5 but really only 12
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate, how much sodium chloride can be formed-use four sig figs in your response?
13.03 g NaCl
How many liters of ammonia gas would be produced if we start with 22.3 L of hydrogen? Write your answer as a number with correct sig figs only. Be sure to use the conversion factor of 22.4 L= 1 mole of any gas and you can use the shortcut if you would like.
14.9 L NH3 (g)
If we have the following equation: 1 cup flour + 2 eggs + 1/2 tsp baking powder---> 5 pancakes How many pancakes can we make with 3 cups of flour?
15.0
How many moles of NaCl result from the complete reaction of 8.2 mol Cl2? Assume more than enough Na. 2Na(s) +Cl2(g) ⇒2NaCl(s) Answer with correct sig figs.
16 mol NaCl
How many electrons can exist in an orbital?
2
Ca(OH)2 (aq) + HF(aq) -->
2 H_{2}O(l) + CaF_{2}(s) (CaF_{2} precipitates)
molecular chemical equation used in the production of elephant toothpaste?
2 H_{2}O_{2}(aq) -> 2 H_{2}O(l)+ O_{2}(g)
When placing aluminum into sulfuric acid, aluminum sulfate and hydrogen gas is formed. 18.2 g of aluminum produces how many g of hydrogen gas.
2.05
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate, how many grams of Copper II nitrate are formed with four sig figs?
20.93 g Cu (NO3) 2
What is the amount in liters that one mole of an ideal gas can occupy? Enter your answer as a number only.
22.4
Aluminum metal reacts with copper (II) chloride to produce aluminum chloride and copper metal.
2Al + 3CuCl2 --> 2AlCl2 + 3Cu
Write the molecular equation that show the reaction of Iron III chloride with magnesium metal.
2FeCl_{3}(aq) + 3Mg(s) -> 3MgCl_{2}(aq) + 2Fe(s)
Write the ionic equation for Iron III chloride and magnesium metal.
2Fe^{3+}(aq) + 6Cl^{-}(aq) + 3Mg(s) -> 3Mg^{2+}(aq) + 6Cl^{-}(aq) + 2Fe(s)
H2 + F2 -->
2HF
Write a molecular equation (predict products) for the gas evolution reaction that occurs when you mix aqueous nitric acid and aqueous sodium carbonate.
2HNO3(aq) + Na2CO3(aq) ⇒H2O (l) + CO2(g) + 2NaNO3 (aq)
NaCl + F2 -> NaF + Cl2
2NaCl + F2 -> 2NaF + Cl2
What is the coefficient for hydrogen in the balanced equation for the reaction of solid iron (III) oxide with gaseous hydrogen to form solid iron and liquid water?
3
Zn + 2HCl → ZnCl2+ H2How many moles of hydrogen are produced from the reaction of 3.0 moles of zinc with an excess of hydrochloric acid?
3.0 moles H2
Hydrochloric acid can dissolve solid iron according to the following reaction: Fe(s) + 2HCl(aq)⇒FeCl2(aq) +H2(g) How much HCl could dissolve a 2.8 g iron padlock? Express your answer as a number with correct sig figs only.
3.7
Review the photosynthesis reaction: 6 CO2 (g) + 6 H2O (l) -> 6 O2 (g) + C6H12O6(aq) How many grams of glucose can be synthesized from 58.5 g of CO2?
39.9
Consider the simple synthesis reaction combining solid potassium and liquid bromine. How many grams of solid Potassium bromide would be produced with 17.8 g of solid potassium?
54.2 g KBr
How many valence electrons does The Lewis structure of oxygen have
6
3 Cu(OH)_{2}(aq) + 2 H_{3}PO_{4}(aq)--->
6 H_{2}O(l) + Cu_{3}(PO_{4})_{2} (s)
4NH3 +3O2⇒2N2+ 6H2O How many liters of nitrogen gas would be produced if we start with 13.28 L of ammonia? Write your answer as a number with correct sig figs only.
6.64
Sodium chloride forms in this reaction between sodium and chlorine. How many moles of NaCl result from the complete reaction of 3.4 moles of Cl2?
6.8
How many valence electrons are in a chlorine atom?
7
K3PO4 + Al(NO3)3→ 3KNO3 + AlPO4How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react? Write your answer as number only.
7.5
Using the equation for winemaking, how many liters of carbon dioxide would be produced with 287.62 g of glucose? Enter your answer as a number with correct sig figs only.
71.5
How many valence electrons are in the noble gases (Group VIIIA) all the way to the right of the periodic table.
8
Consider the following equation which shows the combustion of butane used in lighters: 2C4H10(g) + 13 O2(g) ⇒8CO2(g) +10 H2O (l). How many grams of water can be produced from 5.22 g of butane (C4H10)?
8.09 g H2O
2KClO3 → 2KCl + 3O2How many moles of oxygen are produced by the decomposition of 6.0 moles of potassium chlorate?
9.0 moles O2
Solid aluminum reacts with gaseous chlorine. If you begin with 0.552 mol of aluminum and 0.887 mol of chlorine, what is the limiting reactant and theoretical yield of the product in moles?
Al, 0.552 mol AlCl3
Lewis theory predicts that the formula for a compound between barium and sulfur:
BaS
Name the precipitate that forms when aqueous solutions of barium nitrate an potassium sulfate are mixed.
BaSO_{4}(s)
Which element has the highest electron affinity?
C
Which of the following answers shows a complete and balanced equation showing the combustion of propane (C3H8)?
C_{3}H_{8}(g) + 5O_{2}(g)-> 3CO_{2}(g) + 4 H_{2}O(l)
Lewis theory predicts that the formula for a compound between calcium and carbide is.
CaC2; Ca4C2
Lewis theory predicts that the formula for a compound between flourine and calcium is:
CaF2
Stoichiometry can be applied to the making of lots of foods we all enjoy such as
Cheese, chocolate, wine, & beer
Please show the net ionic equation for the reaction of Copper II chloride with silver acetate.
Cl^{-}(aq) + Ag^{+}(aq) -> AgCl(s)
Which of the following atoms is the largest?
Cs
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate, what is the limiting reactant? Use answer explanation and knowledge from 5.29 to answer.
CuCl2
The molecular equation that shows the reaction of Copper II chloride with silver acetate is:
CuCl2(aq) + 2AgC2H3O2(aq) ---> Cu(C2H3O2)2(aq) + 2AgCl(s)
Please show the ionic equation of the reaction of Copper II chloride with silver acetate.
Cu^{2+}(aq) + Cl^{-}(aq) + 2Ag^{+}(aq) + 2C_{2}H_{3}O_{2}-(aq) -> Cu^{2+}(aq) + 2C_{2}H_{3}O_{2}^{-}(aq) + 2AgCl(s)
What is fermentation? Remember this relates to our mass to volume stoichiometry problems.
Fermentation is the breakdown of carbohydrates in an environment where there isn't oxygen.
What is the complete name of the most electronegative element in the periodic table?
Flourine
Which of the following show evidence of a chemical reaction? - Formation of gas - condensation - evaporation
Formation of gas
Which of the following answers shows a complete and balanced equation showing the reaction of nitric acid with potassium hydroxide?
HNO_{3}(aq)+KOH(aq)->KNO_{3}(aq)+ H_{2}O(l)
ionic equation of the at-home experiment for elephant toothpaste?
H_{2}O_{2}(aq) ^{2+}->H_{2}(g)+ + O_{2}(g)^{2-}
22.0 g of potassium reacts with 18.2 g of iodine. Calculate which reactant is limiting and how much product is made. LR=Limiting Reactant
I2LR, 24.0 g KI
What is a spectator ion?
Ions that are unchanged on both sides of equation and do not participate in the reaction.
Lewis theory predicts that the formula for a compound between potassium and sulfur is:
K2S
Which of the following elements have the least metallic character?
Li
How is metallic character defined?
Metallic character is defined as how readily an atom can lose an electron.
Which of the following atoms have the following electron configuration 1s^{2}2s^{2}2p^{6}3s^{1}?
Na
2NaC_{2}H_{3}O_{2} + 1H_{2}SO_{4} --->
Na_{2}SO_{4} (aq)+ 2 CH_{3}COOH(aq) (no precipitate)
What is the net ionic equation for the following reaction? Pb(NO3)2(aq) + 2LiCl(aq) ⇒ PbCl2(s) + 2LiNO3(aq)
Pb2+ (aq) + 2Cl-(aq) ⇒PbCl2(s)
Identify the reactant(s) in the following reaction: 2KClO3 --> 2KCl + 3O2
Potassium Chlorate (KClO3)
Which of the following elements have the lowest ionization energy?
Rb
Excess reactant
The reactant with amounts left over
How are the patterns seen in the periodic table for ionization energy and electron affinity related?
They both have the same trends seen.
Refer to the following chemical equation to answer this question: H2 + O2 --> 2H2O Explain this in words.
Two hydrogen atom combine with one oxygen molecule to produce two water molecules.
3HBr(aq)+Al(OH)_{3}(aq)--->3H_{2}O(l)+AlBr_{3}(aq)
acid-base
2HCl(aq) + K2S(aq) -> H2S(g) + 2Kcl(aq) What type of reaction is this? End your answer with the word reaction.
acid-base reaction
HCl(aq) + KOH(aq) --> KCl(aq) + H2O(l)
acid-base reaction
What is step 5 in stoichiometry problems?
d Use your mole ratio from the balanced chemical equation. (The mole conversion factor comes from the coefficients of the balanced chemical equation.)
2KI(aq)+Pb(NO3)2(aq)→2KNO3(aq)+PbI2(s)
precipitation
AgNO3(aq) + KCl(aq) --> AgCl(s) + KNO3(aq)
precipitation
In this type of reaction, two aqueous compounds produce a solid product.
precipitation
on the right side of the arrow in a chemical reaction.
products
Write the molecular equation below in words: 2NH_{4}Cl(aq) + Hg (NO_{3})_{2}(aq)---> Hg Cl_{2}(s) + 2NH_{4}NO_{3}(aq)
queous Ammonium chloride reacts with aqueous Mercury (II) nitrate to produce solid Mercury II chloride and aqueous Ammonium nitrate
on the left side of the arrow in a chemical reaction.
reactants
Classify the following reaction: Magnesium and oxygen gas produce magnesium oxide
redox
What type of reaction does the following statement describe? electrons are transferred from one substance to another
redox
What does an acid base reaction produce along with water?
salt
3Pb(s) + 2H_{3}PO_{4}(aq)--->3H_{2}(g) + Pb_{3}(PO_{4})_{2} (s)
single replacement
Classify the following reaction: magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen gas
single replacement
Classify the following reaction: Calcium and hydrochloric acid produce calcium chloride and hydrogen gas
single-replacement
Solubility of CaCl2
soluble
STP stands for
standard temperature and pressure
What is a catalyst?
substance that speeds up the rate of a chemical reaction
2NH_{3} (aq)+H_{2}SO_{4}(aq)--->(NH_{4})_{2}SO_{4}(aq)
synthesis
Magnesium hydroxide is
insoluble
The __ reactant is the reactant that gets used up first and determines the amount of product for a problem.
limiting
What should not be done when predicting products of reactions?
carrying over subscripts
4C_{5}H_{9}O(aq) + 27O_{2}(g)-->20CO_{2}(g)+ 18H_{2}O(l)
combustion
CH4 + 2O2 --> CO2 + 2H2O
combustion reaction
What type of reaction is performed with the elephant toothpaste demonstration?
decomposition
Which type of reaction requires the most energy?
decomposition
2NaBr (aq) + Ca(OH)_{2} (aq)--->CaBr{2}(aq) + 2NaOH(aq)
double replacement
What other reaction types can an acid-base reaction also be?
double replacement; precipitation
Both precipitation and acid-base reactions can also be classified as:
double-displacement
What is a valence electron?
electrons in the outermost shell