So to find a base by its formula, does it end in COO or COOH? Can a base be both of those endings?
1 answer:
Answer:
To find a base by its formula, does it end in COO-
A base never ens with COOH
Explanation:
According to Bronsted Acid - Base theory : When an acid and base reacts with each other , the acid form its conjugate base and base will form its conjugate acid because of exchange of proton .
If HA = acid and B = base react each other then they generate their conjugate Base (A-) and acid (HB+) respectively .
The equation is represented as :
Here A- is conjugate base of HA acid
HB+ is conjugate acid of base B
COOH group is the carboxylic acid group = acid
Suppose A carboxylic acid RCOOH is added in water(H2O)
Here
RCOOH = Acid and its conjugate -base is RCOO-
Hence A Base end with formula COO-
COOH is always acid
You might be interested in
Answer:
Explanation:
Given parameters:
Mass of aluminium oxide = 3.87g
Mass of water = 5.67g
Unknown:
Limiting reactant = ?
Solution:
The limiting reactant is the reactant in short supply in a chemical reaction. We need to first write the chemical equation and convert the masses given to the number of moles.
Using the number of moles, we can ascertain the limiting reactants;
Al₂O₃ + 3H₂O → 2Al(OH)₃
Number of moles;
Number of moles =
molar mass of Al₂O₃ = (2x27) + 3(16) = 102g/mole
number of moles = = 0.04mole
molar mass of H₂O = 2(1) + 16 = 18g/mole
number of moles = = 0.32mole
From the reaction equation;
1 mole of Al₂O₃ reacted with 3 moles of H₂O
0.04 mole of Al₂O₃ will react with 3 x 0.04 mole = 0.12 mole of H₂O
But we were given 0.32 mole of H₂O and this is in excess of amount required.
This shows that Al₂O₃ is the limiting reactant
It will take 5.2 years to decay.
The half life of cobalt-60 is 5.2 years. The half life is the time taken for the mass of the substance to decrease by a half.
here, the amount of remaining substance is 50%,
so,
n. log (0.5) = log (0.5)
n = 1
So it would take 1 half lives to decay this much, which is 1 x 5.2 which is 5.2 years.
what do you mean by radioactive decay ?
The process through which an unstable atomic nucleus loses energy via radiation is known as radioactive decay, also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration. A material that has unstable nuclei is considered as radioactive.
Learn more about decay here:-
#SPJ1