Answers2026-2027_MDCPS_2003345_Chemistry_1_B-CRLab: Measuring pH

Lab: Measuring pH — Cumulative exam Answers

2 verified answers1 views
1
Free Preview

Which diagram shows electrons violating the Pauli exclusion principle?

A
A box contains an up arrow.
Option A
B
A box contains an up and a down arrow.
Option B
C
A box contains an up and a down arrow.
Option C
D
A box contains an up and a down arrow.
Option D
2
Free Preview

In which orbitals would the valence electrons for carbon (C) be placed?

A
s orbital and d orbitals
B
s orbital only
C
p orbitals only
D
s orbital and p orbitals
3

The diagram below shows that the periodic table is divided into different blocks.Elements that have complete valence electron shells are mostly found in the

Question illustration
A
s block.
B
d block.
C
p block.
D
f block.
4

Water is dissolved into n-butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n-butanol?

A
n-Butanol mixes with water.
B
Water molecules are carried into n-butanol.
C
n-Butanol molecules surround water molecules.
D
n-Butanol molecules are attracted to the surface of the water molecules.
5

The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?

A
covalent bonds
B
hydronium ions
C
electron pairs
D
hydroxide ions
6

The table below gives the numbers of protons, electrons, and neutrons in four atoms.AtomNumber of protonsNumber of electronsNumber of neutrons1393952240405033939544404051Based on the information that is given, which atom in the table has the highest mass?

A
1
B
2
C
3
D
4
7

The properties of two elements are listed below.ElementAtomic radius(pm)Ionic radius(pm)First ionization energy(kJ/mol)Electron affinity(kJ/mol)ElectronegativityBr1141951140–3253.0K243152.2418.8–48.40.82Which prediction is supported by the information in the table?

A
K will give up an electron more easily than Br.
B
Both K and Br will have the same pull on electrons.
C
K will have a smaller size in comparison to Br.
D
Both K and Br will produce ions of the same size.
8

Which compound contains both sigma and pi bonds?

A
HCCl3
B
H2CO
C
H2S
D
HBr
9

Which best describes the function of a centrifuge?

A
to separate the solute from the solvent
B
to separate the dissolved part of a solution into layers
C
to separate a mixture by heating it for a long period of time
D
to separate the undissolved particles of a mixture into layers
10

Which is the first step in the dissolving process?

A
The solute becomes like the solvent.
B
The solute molecules are carried into the solution.
C
The solvent molecules surround the solute particles.
D
The solvent molecules are attracted to particles at the surface of the solute.
11

Two cups of coffee, one that is at 10°C and one that is at 20°C, are mixed. Which statement about the temperature of the mixture is correct?

A
There is no kinetic energy transfer so the temperature of the coffee in the warmer cup is the final temperature.
B
The kinetic theory dictates that the temperature of the coffee in the cooler cup is the final temperature.
C
Energy is transferred from faster moving molecules to slower moving molecules, and the result is the average of 15°C.
D
Energy transfer occurs as the molecules collide, and the result is additive; the final temperature is 30°C.
12

Which statement is true about crystal lattice energy?

A
It increases as the size of the ions increases.
B
It increases as the charge on the ions decreases.
C
It is the energy that ions absorb when they form a crystal.
D
It is a measure of the strength of the bonds between ions.
13

A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?

A
K
B
Zr
C
Ca
D
Sc
14

A beam of light passes though a liquid in a test tube without scattering. Which type of mixture is most likely in the test tube?

A
colloid
B
emulsion
C
solution
D
suspension
15

According to the collision theory, which is required for a high number of effective collisions?

A
a very low amount of force from colliding molecules
B
a very low amount of kinetic energy from colliding molecules
C
molecular collisions that have very specific orientations
D
molecular collisions with energy to overcome activation energy
16

In an experiment, a student wants to increase the rate of a reaction that involves gases. Which change to the reactants would accomplish this?

A
Increase the volume to decrease pressure and to increase concentration.
B
Increase the volume to increase pressure and to decrease concentration.
C
Decrease the volume to decrease pressure and to increase concentration.
D
Decrease the volume to increase pressure and to increase concentration.
17

Which of the following best describes a pair of elements that will form an ionic bond?

A
C and H: Hydrogen easily loses electrons, and carbon gains them.
B
Li and O: Oxygen easily loses electrons, and lithium gains them.
C
P and Cl: Phosphorus easily loses electrons, and chlorine gains them.
D
Ca and Br: Calcium easily loses electrons, and bromine gains them.
18

Which is true of transition metals when moving from left to right on the periodic table?

A
The d sublevels are not filled across the period.
B
The cation radii become larger across the period.
C
Atomic radii increase slightly and then start to decrease.
D
Atomic radii decrease slightly and then start to increase.
19

Which of the following shows a Bronsted-Lowry acid reacting?

A
CO + NO2 CO2 + NO
Option A
B
NH3 + H+ NH4+
Option B
C
+ H+ HCO3–
Option C
D
HCl + H2O H3O+ + Cl–
Option D
20

When a drawing of a circle made in the center of a piece of paper with a black marker gets wet, the marker bleeds, and as the water moves through the paper the ink separates into several colors. What method of separation does this describe?

A
evaporation
B
distillation
C
filtration
D
chromatography

Did you find these answers helpful?

More from this Course

Quiz
50 verified answers

Cumulative Exam

Quiz
10 verified answers

Balancing Oxidation-Reduction Equations

Quiz
9 verified answers

Equilibria of Acids and Bases