Number of moles of NaOH = V(NaOH) * M(NaOH)= 0.150 L * 0.1 moles/L = 0.015 moles
Number of moles of formic acid, HCOOH = V(HCOOH) * M(HCOOH) = 0.200 L * 0.1 moles/L = 0.020 moles
Here, the limiting reagent is NaOH
The reaction is represented as:
HCOOH + NaOH ↔HCOONa + H2O
Moles of HCOONa formed = Moles of the limiting reagent, NaOH = 0.015 moles
Moles of HCOOH remaining = 0.020-0.015 = 0.005 moles
Total final volume is given as 1 L
Therefore: [HCOOH] = 0.005 moles/1 L = 0.005 M
[HCOONa] = 0.015/1 = 0.015 M
pKa of HCOOH = 3.74
As per Henderson-Hasselbalch equation
pH = pka + log[HCOONa]/[HCOOH] = 3.74+log[0.015/0.005] = 4.22
Therefore, pH of the final solution = 4.22
Answer:
B. oxidation; reduction
Explanation:
A voltaic cell is electro-chemical cell in which chemical energy is converted into electrical energy.
1. This cell utilizes chemical reaction to generate electric.\
2. there two electrode anode and cathode
3. At Anode oxidation occurs
4. At cathode reduction occurs
5. chemical is present in the cell which is electrolyte which completes the circuit of the voltaic cell.
- oxidation is the process in which there is loss of electrons
- Reduction is the process in which there is gain of electrons
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Based on above discussion
At anode oxidation takes place
At cathode reduction takes place.
Hence, correct option is B. oxidation; reduction
I think in drylands, drylands are particularly affected by desertification.
Increasing every day. in 2013, we had about 7.125 Billion. in 9160, we had closer to 3 billion. It is still on a pretty steady clime today.
Answer:
Tetrahedral molecules are normally spy hybridized.
Explanation: