Unit 4

Quiz
•
Chemistry
•
12th Grade
•
Easy
+5
Standards-aligned
Comedy Slime
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29 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The diagrams above represent solutes present in two different dilute aqueous solutions before they were mixed. Water molecules are not shown. When the solutions were combined, a precipitation reaction took place. Which of the diagrams below is the best particle representation of the mixture after the precipitate reaction occurred?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 2 mol sample of F₂(g) reacts with excess NaOH(aq) according to the equation above. If the reaction is repeated with excess NaOH(aq) but with 1 mol of F₂(g), which of the following is correct?
The amount of OF₂(g) produced is doubled.
The amount of OF₂(g) produced is halved.
The amount of NaF(aq) produced remains the same.
The amount of NaF(aq) produced is doubled.
Tags
NGSS.HS-PS1-5
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Equal volumes of 0.2 M solutions of lead(II) nitrate and potassium bromide are combined to form lead(II) bromide as a yellow precipitate. Which of the following is the correct net ionic equation for the reaction?
Pb²⁺ (aq) + 2 Br⁻ (aq) → PbBr₂ (s)
K⁺ (aq) + NO₃⁻ (aq) → KNO₃ (aq)
Pb²⁺ (aq) + 2 NO₃⁻ (aq) + 2 K⁺ (aq) + 2 Br⁻ (aq) → 2 K⁺ (aq) + 2 NO₃⁻ (aq) + PbBr₂ (s)
Pb(NO₃)₂ (aq) + 2 KBr (aq) → PbBr₂ (s) + 2 KNO₃ (aq)
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student was studying physical and chemical changes. The student carried out some procedures in the laboratory and recorded observations. For one of the procedures, the student concluded that a physical change took place, but not a chemical change. Which of the following could have been the results of the procedure?
A cube of metal was changed into a flat sheet of metal.
When two liquids at room temperature were combined in a beaker, the beaker became hot.
When two clear liquids were combined, the resulting mixture was cloudy.
When a colorless liquid was added to a blue liquid, the resulting solution was yellow.
Tags
NGSS.MS-PS1-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student had two dilute, colorless solutions, HCl(aq) and NaOH(aq), which were at the same temperature. The student combined the solutions, and the reaction represented above occurred. Which of the following results would be evidence that a chemical reaction took place?
The resulting solution is colorless.
The temperature of the reaction mixture increases.
The total volume of the mixture is approximately equal to the sum of the initial volumes.
The resulting solution conducts electricity.
Tags
NGSS.HS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student was asked to formulate a hypothesis about what would happen if 100. mL of 0.1 M NaOH(aq) at 25°C was combined with 100. mL of 0.1 M MgCl₂(aq) at 25°C. Which of the following hypotheses indicates that the student thought a chemical change would occur?
The volume of the resulting solution will be equal to the sum of the volumes of the original solutions.
The mass of the resulting solution will be equal to the sum of the masses of the original solutions.
The resulting solution would contain a precipitate.
The resulting solution will be clear.
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reaction 2 occurs when an excess of 6 M HCl(aq) solution is added to 100. mL of NaOCl(aq) of unknown concentration. If the reaction goes to completion and 0.010 mol of Cl2(g) is produced, then what was the molarity of the NaOCl(aq) solution?
0.0010 M
0.010 M
0.10 M
1.0 M
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