According to the Arrhenius concept, which of the following substances is NOT a base in aqueous solutionsA. NH3B. LiOHC. NaOHD. H
1 answer:
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Answer: Volume of water to be added is 116 ml.
Explanation:
Elevation in boiling point is given by:
= elevation in boiling point
i= vant hoff factor = 1 (for non electrolyte)
=boiling point constant =
m= molality
Density of solvent =
(1kg=1000g)
Mass of solute (water) = x g
Density of solute =
Thus the volume of water to be added is 116 ml.
pH=8.87
<h3>Further explanation</h3>Reaction
C₂H₄O₂+NaOH⇒CH₃COONa+H₂O
at the equivalence point = mol C₂H₄O₂= mol NaOH
mol C₂H₄O₂ : 50 x 0.1 = 0.5 mlmol=5.10⁻⁴ mol
The two reactants have completely reacted, and there is only salt(CH₃COONa) and water(H₂O), there will be hydrolysis
For acids from weak acids and strong bases (the solution is alkaline) then the calculation:
M=anion concentration=CH₃COO⁻
Ka=acid constant(for CH₃COOH,Ka=1.8.10⁻⁵)
pOH=6-log 7.483=5.13
pH= 14 - 5.13=8.87
Answer:
Explanation:
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In this case, according the given balanced chemical reaction:
It is possible to evidence the 1:1 mole ratio of hydrogen (molar mass = 2.02 g/mol) to zinc (atomic mass = 65.41 g/mol) which is used to calculate the grams of the latter needed for the production of 5 grams of the former via stoichiometry:
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