When completing the diffusion of a dye through water, where does the 0 mm mark on your ruler go?
1 answer:
The Problem bother on the diffusion of substance
What is diffusion?
This can be defined as the movement of particles from a region of higher concentration to a region of lower concentration till equilibrium is reached
Explanation:
From the experiment seeks to measure the diffusion distance against time
Now when dye is dropped in water, the particles/molecules of the dye interacts with the molecules of water hence there is a mixtures which cause the dye to move from the initial position of higher concentration to lower concentration.
Hence the movement from the 0 mm mark increases in both directions
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Answer:
66.67%
Explanation:
From the given information:
mass of cyclohexane = 2.9949 grams
density of cyclohexane = 0.779 g/mL
Recall that:
Density = mass/volume
∴
Volume = mass/density
So, the volume of cyclohexane = 2.9949 g/ 0.779 g/mL
= 3.8445 mL
Also,
mass of propylbenzene = 1.6575 grams
density of propylbenzene = 0.862 g/mL
Volume of propylbenzene = 1.6575 g/ 0.862 g/mL
= 1.9229 mL
The volume % composition of cyclohexane from the mixture is:
= 66.67%
0.040 mol / dm³. (2 sig. fig.)
<h3>Explanation</h3> in this question acts as a weak base. As seen in the equation in the question,
produces
rather than
when it dissolves in water. The concentration of
will likely be more useful than that of
for the calculations here.
Finding the value of from pH:
Assume that ,
.
.
Solve for :
Note that water isn't part of this expression.
The value of Kb is quite small. The change in is nearly negligible once it dissolves. In other words,
.
Also, for each mole of produced, one mole of
was also produced. The solution started with a small amount of either species. As a result,
.
,
,
.