The green pigment required for photosynthesis is:
1 answer:
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Answer:The correct answer is option 4.
Explanation:
Arrhenius acids are those compounds which gives ions when dissolved in their aqueous solution.
Arrhenius bases are those compounds which gives ions when dissolved in their aqueous solution.
are Arrhenius acids because they form
ions in their respective aqueous solution.
Hence, the correct answer is option 4.
Answer:
pH = 2.46
Explanation:
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In this case, since this neutralization reaction may be assumed to occur in a 1:1 mole ratio between the base and the strong acid, it is possible to write the following moles and volume-concentrations relationship for the equivalence point:
Whereas the moles of the salt are computed as shown below:
So we can divide those moles by the total volume (0.021L+0.0066L=0.0276L) to obtain the concentration of the final salt:
Now, we need to keep in mind that this is an acidic salt since the base is weak and the acid strong, so the determinant ionization is:
Whose equilibrium expression is:
Now, since the Kb of C6H5NH2 is 4.3 x 10^-10, its Ka is 2.326x10^-5 (Kw/Kb), we can also write:
Whereas x is:
Which also equals the concentration of hydrogen ions; therefore, the pH at the equivalence point is:
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