n strong acids/bases and weak acids/bases . Identify reducing agent and oxidizin

Question

n strong acids/bases and weak acids/bases . Identify reducing agent and oxidizing agent for redox reactions. Explain the observations made in lab with both words and balanced chemical equations ample quiz/exam questions AgNOs(a) is a colotless solution. When red copper wire is added to AgNOs solution, the solution slowed changed to light blue and the red copper wire is covered by some gray- ish but shinny ma a. What is causing the solution from colorless to light blue? terials. h. What is the identify of the shinny materials on copper wire? c. Use the balanced chemical equation to explain the observations. Predict the observations when the following solutions are mixed- a. NaOH(a) and HSO4(aq) b. CaCO3(s) and HCl(aq) c Pb(NO3)zfaq) and NaySO4laq) Wzite the net ionic equation for reaction between NaOHoe) and CHscooHfee) Identify any spectator ions.

Explanation / Answer

3)
NaOH is a strong base
Acetic acid is weak

CH3COOH(aq) + Na+ (aq) + OH-(aq) ---> Na+ (aq) + CH3COO-(aq) + H2O(l)
cancel Na+ ion on both sides to get net ionic equation:
CH3COOH(aq) + OH-(aq) ---> CH3COO-(aq) + H2O (l)

4)
Let see the chaane in oxidation state for each
a)
Na changes from 0 state to 1 state (Na is oxidised)
H in water changes from +1 state to 0 state in H2 (H in water is reduced)
So,
H2O is oxidising agent and Na is reducing agent
b)
S in K2S2O3 is oxidised from -2 state to +6 in KHSO4 --> oxidation
Cl changes from 0 to -1 ---> reduction
So,
K2S2O3 is reducing agent
Cl2 is oxiding agent

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