Answer:
Approximately .
Step-by-step explanation:
Remark: this approach make use of the fact that in the original solution, the concentration of and are equal.
Since is a salt soluble in water. Once in water, it would readily ionize to give and ions.
Assume that the and ions in this solution did not disintegrate at all. The solution would contain:
of , and
of from of .
Accordingly, the concentration of and would be:
.
In other words, in this buffer solution, the initial concentration of the weak acid is the same as that of its conjugate base, .
Hence, once in equilibrium, the of this buffer solution would be the same as the of .
Calculate the of from its :
d = vt
Step 1: Write equation
v = d/t
Step 2: Multiply both sides by t
vt = d
Step 3: Rewrite
x^2 + (y+1)^2 = 10^2
Centre (p,q) = (0, -1)
radius, r = 10
General Equation of a circle
(x-p)^2 + (y-q)^2 = r^2
(x-0)^2 + (y- -1)^2 = 10^2
t =12 m
We can use similar triangles and proportions to solve this problem.
Put the smaller triangle on top and the larger triangle on bottom
12 9
------ = -------
16 t
Solve by using cross products
12 t = 9*16
12 t =144
Divide by 12
12t/12 = 144/12
t = 12