1) What is/are the spectator ion(s) of the following chemical reaction?
NaOH(aq) + CH3COOH(aq) --> NaCH3COO(aq) + H2O(l)
A) OH- ion
B) H+ ion
C)CH3COO- ion
D)Na+ ion
2)A beaker of NaOH solution is mixed with another beaker of CuCl2 solution. If there is a chemical reaction occurring, what is the driving force for the chemical reaction?
A) Formation of gas
B)There is actually no reaction will occur.
C) Neutralization
D) Precipitation
3)Predict products of the following reaction:
Cl2 + KI -->
A)KCl +I-
B) KCl + I2
C)ICl + K+
D) ICl + K
4)What is the oxidizing agent of the following reaction?
NaBr + Cl2 --> NaCl + Br2
A) NaCl
B)NaBr
C) Br2
D) Cl2
5)When colorless K2CO3 solution is mixed with colorless HCl solution, what will happen?
A)Color change
B) Nothing
C) Bubbling
D) Precipitation
6)In Vinegar Analysis lab, the end point is reached when the final drop of NaOH makes the mixture basic, which turn the pH indicator pink. However, if we put the flask on the bench long enough, the pink color may eventually disappear due to some substance from the air. What substance from air is causing the pink color of pH indicator to disappear?
A)CO2 to neutralize the small amount of NaOH
B)N2
C) H2O moisture to dilute the solution and make the pink color too light to be seen.
D)O2 to oxidize the pH indicator
1) What is/are the spectator ion(s) of the following chemical reaction?
NaOH(aq) + CH3COOH(aq) --> NaCH3COO(aq) + H2O(l)
| A) | OH- ion |
| B) | H+ ion |
| C)CH3COO- ion |
| D)Na+ ion |
2)A beaker of NaOH solution is mixed with another beaker of CuCl2 solution. If there is a chemical reaction occurring, what is the driving force for the chemical reaction?
| A) | Formation of gas |
| B)There is actually no reaction will occur. |
| C) | Neutralization |
| D) | Precipitation |
3)Predict products of the following reaction:
Cl2 + KI -->
| A)KCl +I- |
| B) | KCl + I2 |
| C)ICl + K+ |
| D) | ICl + K |
4)What is the oxidizing agent of the following reaction?
NaBr + Cl2 --> NaCl + Br2
| A) | NaCl |
| B)NaBr |
| C) | Br2 |
| D) | Cl2 |
5)When colorless K2CO3 solution is mixed with colorless HCl solution, what will happen?
| A)Color change |
| B) | Nothing |
| C) | Bubbling |
| D) | Precipitation |
6)In Vinegar Analysis lab, the end point is reached when the final drop of NaOH makes the mixture basic, which turn the pH indicator pink. However, if we put the flask on the bench long enough, the pink color may eventually disappear due to some substance from the air. What substance from air is causing the pink color of pH indicator to disappear?
| A)CO2 to neutralize the small amount of NaOH |
| B)N2 |
| C) | H2O moisture to dilute the solution and make the pink color too light to be seen. |
| D)O2 to oxidize the pH indicator |
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