Worksheets111 SI 10.13
Total questions: 25
Worksheet time: 1hrs 4mins
Reduction is the ___________ of electrons.
loss
gain
transfer
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What is the oxidation number of iodine in KIO3?
5
1
0
-1
Determine the oxidation number of chromium in CrO42-.
5
6
4
2
Which statement is true:
Mg → Mg2+ + 2e–
Mg gains 2 electrons
Mg2+ loses 2 electron
Mg loses 1 electron
Mg loses 2 electrons
In a redox reaction, the species reduced
gains electrons and is the oxidizing agent
loses electrons and is the oxidizing agent
gains electrons and is the reducing agen
loses electrons and is the reducing agent
What is the oxidation number assigned to manganese in KMnO4?
7
5
4
0
Which element was reduced in the reaction below?
Na + PbCl2 → Pb + NaCl
Na
Pb
Cl
No element was reduced
A student titrates an unknown amount of KHP with 20.46 mL of 0.1000 M of NaOH. KHP (mm=204.22 g) has one acidic hydrogen. What mass of KHP was titrated by the NaOH solution.
(a)
A 10.00 mL sample of vinegar, an aqueous solution of acetic acid (HC2H3O2) is titrated with 0.5062 M NaOH, and 16.58 mL is required to reach the equivalence point. What is the molarity of acetic acid
(a)
What mass of barium sulfate can be produced when 100.0 mL of 0.100 M solution of barium chloride is mixed with 100.0 mL of 0.100 M solution of iron (III) sulfate.
(a)
What is the net ionic equation for acid base reactions?
HCl + NaOH ---> H20 + NaCl
H+ + OH- ---> H20
There is no net ionic equation
H+(aq) + OH-(aq) ---> H2O (l)
Which element was oxidized in the reaction below?
Na + PbCl2 → Pb + NaCl
Na
Pb
Cl
No element was reduced
When the solids Ba(OH)2 and NH4SCN are mixed, a solution is produced and the temperature drops. Which statement about the energetics of this reaction is correct?
The reaction is endothermic and ΔH is negative
The reaction is endothermic and ΔH is positive
The reaction is exothermic and ΔH is negative
The reaction is exothermic and ΔH is positive
Which of the following represents an exothermic reaction?
Study the reaction below. Is it exothermic or endothermic?
H2 + Cl2 --> 2 HCl + 1845 kJ
Exothermic Reaction
Endothermic Reaction
A 110 g sample of copper (specific heat=0.20) is heated to 82.4 C and then placed in in water at 22.3 C. The final temperature of the water and copper is 24.9 C. What is the mass of water in the container? Give answer in 2 sig fig and label your answer)
(a)
