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WorksheetsReview for first partial MyS
Total questions: 61
Worksheet time: 31mins
Select the characteristics that corresponds to an acid
Sour taste
Bitter taste
pH lower than 7
pH higher than 7
Soapy texture
Select the characteristics that apply to a base
Sour taste
Bitter taste
pH lower than 7
pH higher than 7
Soapy texture
According to Arrhenius an acid is
A proton donator
A proton acceptor
A substance that dissociated in water produces H+
A substance that dissociated in water produces OH-
According to Arrhenius a base is
A proton donator
A proton acceptor
A substance that dissociated in water produces H+
A substance that dissociated in water produces OH-
According to Brönsted-Lowry a base is
A proton donator
A proton acceptor
A substance that dissociated in water produces H+
A substance that dissociated in water produces OH-
According to Brönsted-Lowry an acid is
A proton donator
A proton acceptor
A substance that dissociated in water produces H+
A substance that dissociated in water produces OH-
pOH means…
Hydroxide ions concentration
Hydronium ions concentration
pH means…
Hydroxide ions concentration
Hydronium ions concentration
They dissociate completely in water and are excellent electrical conductors
Strong acids
Strong bases
Weak acids
Weak bases
Their dissociation in water is low and they are poor electrical conductors
Strong acids
Strong bases
Weak acids
Weak bases
It is when the atoms of a substance separate in an aqueous solution.
Dissociation
Electrolyte
Chemical split
Distillation
A substance that has been dissociated and is capable to conduct electricity.
Electrolyte
Electron
Mol
All the options are wrong
They are methods to measure pH
Litmus paper
pH meter
Indicators
Cromatography
Calculate [H3O+] for a urine sample, which has a pH of 7.5
(a)
If a solution of aspirin has a [H3O+] = 1.7 X 10-3 M, what is the pH of the solution?
(a)
What is the pH of an ammonia solution with [OH-] = 3.7 X 10-3 M?
(a)
Calculate the pH of a sample of bile that has [OH-] = 1.3 X 10-6 M.
(a)
What is the pH of egg whites with [OH-] = 1.2 * 10-5 M?
(a)
What is the [H3O+] of cola that has a pH of 3.17?
(a)
What is the [OH-] of cola that has a pH of 3.17?
(a)
Carbon monoxide and hydrogen are used to produce methanol (CH4O). The balanced chemical reaction is:
CO(g) + 2H2(g) ---> CH4O(g)
If 3.00 moles of CO and 5.00 moles of H2 are the initial reactants, how many moles of methanol can be produced?
(a)
Carbon monoxide and hydrogen are used to produce methanol (CH4O). The balanced chemical reaction is:
CO(g) + 2H2(g) ---> CH4O(g)
If an initial mixture of reactants contains 4.00 moles of CO and 4.00 moles of H2, how many moles of methanol can be produced?
(a)
Carbon monoxide and hydrogen are used to produce methanol (CH4O). The balanced chemical reaction is:
CO(g) + 2H2(g) ---> CH4O(g)
If an initial mixture of reactants contains 1.50 moles of CO and 6.00 moles of H2, how many moles of methanol can be produced?
(a)
The reactant that is completely used up is the limiting reactant.
True
False
The reactant that does not completely react and is left over is called the excess reactant.
True
False
How many grams of CO are formed from 70.0 g of SiO2 and 50.0 g of C?
SiO2(s) + 3C(s) ----> SiC(s) + 2CO(g)
(a)
How many grams of SO2 are formed from the reaction of 8.52 g of H2S and 9.60 g of O2?
2H2S(g) + 3O2(g) ----> 2SO2(g) + 2H2O(g)
(a)
How many grams of H2O are formed from the reaction of 15.0 g of H2S and 25.0 g of O2?
2H2S(g) + 3O2(g) -----> 2SO2(g) + 2H2O(g)
(a)
Conditions to form a product
Activation energy
Moles
Collision
Orientation
The equilibrium constant is represented as
Kc
Kw
Keq
Ki
During the equilibrium the amount of the reactants and products may vary
True
False
At equilibrium the rate of the forward reaction is equal to the rate of the reverse reaction.
True
False
Calculate the equilibrium constant for the following reaction at the given concentrations
H2(g) + I2(g) <-----> 2HI(g)
(a)
The decomposition of dinitrogen tetroxide forms nitrogen dioxide.
N2O4(g) <-----> 2NO2(g)
What is the numerical value of Kc if a reaction mixture contains 0.45 M N2O4 and 0.31 M NO2?
(a)
Calculate the numerical value of Kc if an equilibrium mixture contains 0.040 M NH3, 0.60 M H2, and 0.20 M N2.
2NH3(g) <-----> 3H2(g) + N2(g)
(a)
The topical antibiotic ointment Neosporin is 3.5% (m/m) neomycin solution. How many grams of neomycin are in a tube containing 64 g of ointment?
(a)
Calculate the grams of KCl in 225 g of an 8.00% (m/m) KCl solution.
(a)
Calculate the grams of KNO3 in 45.0 g of a 1.85% (m/m) KNO3 solution.
(a)
What is the mass percent of NaOH in a solution prepared by dissolving 30.0 g of NaOH in 120.0 g of H2O?
(a)
What is the mass percent (m/m) of NaCl in a solution made by dissolving 2.0 g of NaCl in 56.0 g of H2O?
(a)
What is the mass percent (m/m) of MgCl2 in a solution prepared by dissolving 1.8 g of MgCl2 in 18.5 g of H2O?
(a)
What is the molarity (M) of 60.0 g of NaOH in 0.250 L of NaOH solution?
Consider NaOH= 40 g/mol
(a)
What is the molarity of a solution that contains 75.0 g of KNO3 dissolved in 0.350 L of solution?
Consider KNO3 = 101 g/mol
(a)
How many liters of a 2.00 M NaCl solution are needed to provide 67.3 g of NaCl?
(a)
How many milliliters of a 6.0 M HCl solution will provide 164 g of HCl?
(a)
Decide the kind of compound
Organic
Inorganic
Decide the kind of compound
Organic
Inorganic
Decide the kind of compound
Organic
Inorganic
Decide the kind of compound
Organic
Inorganic
Decide the kind of compound
Organic
Inorganic
Decide the kind of compound
Organic
Inorganic
Proposed the concept of tetravalency
Kekulé
Berzelius
Whöler
Kolbe
They are carbon allotropes
Carbonates
Fullerenes
Graphite
Diamonds
Characteristic that allow the carbon atoms to form larger compounds
Tetravalency
Allotropy
Catenation
Characteristic that allow the carbon atoms to form 4 bonds
Tetravalency
Allotropy
Catenation
Characteristic of pure carbon compounds to have different macroscopic structures according to their molecular disposition.
Tetravalency
Allotropy
Catenation
Soluble in non-polar solvents.
Organic compounds
Inorganic compounds
Good electric conductors
Organic compounds
Inorganic compounds
Need catalyzers for their reactions.
Organic compounds
Inorganic compounds
Low boiling and melting points.
Organic compounds
Inorganic compounds
Their reactions are reversible.
Organic compounds
Inorganic compounds
