Animals and plants need to maintain homeostasis to function properly. A)True B)False
2 answers:
You might be interested in
Explanation:
(A) As we know that carbonic acid () and Sodium bicarbonate (
) forms an acidic buffer.
Therefore, pH of an acidic buffer is given by Hendeerson-Hasselbalch equation as follows.
pH = ........... (1)
So mathematically, if [Salt] = [Acid] then = 1
.
And, = 0
Therefore, equation (1) gives us the following.
pH = (when acid and salt are equal in concentration)
Hence, of
(carbonic acid) is 6.35.
And, with this we have following results.
In (A) and (D) we have the case \frac{[NaHCO_{3}]}{[H_{2}CO_{3}]}[/tex] i.e. [Salt] = [Acid].
Hence, for the cases pH = = 6.35.
(B) = 0.045 M and,
= 0.45 M
Hence, pH =
=
= 6.35 + (-1)
= 5.35
Therefore, it means that this buffer will be most suitable buffer as it has pH on acidic side and addition of slight excess base will not affect much of its pH value.
(C) = 0.45 M
= 0.045 M
So, pH =
=
= 6.35 + (+1)
= 7.35
This means that pH on Basic side makes it no more acidic buffer.
Answer:
Explanation:
The valancy of Cu = +2
SO4 = -2
CN = -1
H =+1
So when HCN and CuSO4 react Cu(CN)2 and H2SO4 are formed.
Cu(CN)2 formation :
2 CN = 2 x -1 = -2
Its should attach to +2 charge atom which is Cu
So 1 Cu and 2 CN = Cu(CN)2
Similary,
H2SO4 formation:
SO4 = -2 charge
It require +2 charge so need two H+
2 H = 2x1 = +2 charge
Hence , 1 SO4 and 2 H combine to form H2SO4
<u><em>Law of conservation of mass:</em></u><em> It states that mass can neither be created nor destroyed during a chemical reaction.</em>
<em>Total mass of the reactant must be equal to total mass of product.</em>
<u>Only those equations are balanced which follows law of conservation of mass </u>
Count total number of atoms in the reactant and product .
The number of atoms in the product = The number of atoms in the reactant
In the given equation:
Reactant are 2HCN and CuSO4
atoms of H = 1x2=2 , C=1x2=2 , N=1x2=2 , Cu = 1, S = 1 ,O =4
Products: Cu(CN)2 and H2SO4
atoms of H =2 , S=1 , O=4 ,C = 2x1=2 , N = 2x1 =2 , Cu = 1
Hence this is balance equation