____________ are solutions that resist changes in ph when moderate amounts of acids or bases are added and contain ions or molec
1 answer:
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16 g/ml
<h3>Further explanation</h3>Given
mass = 32.40 g
volume = 2.0mL
Required
Density
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
ρ = density
m = mass
v = volume
Input the value :
ρ = 32.40 g / 2.0 ml
ρ = 16.2 g/ml
Rules for division: The least number of significant figures in the problem determines the number of significant figures in the answer.
32.40 = 4 sig.fig
2.0 = 2 sig fig
The answer must be 2 sig fig
So the answer = 16 g/ml
<u>Answer:</u> The value of for the given acid is
<u>Explanation:</u>
To calculate the molarity of solution, we use the equation:
Initial mass of weak monoprotic acid = 1.00 g
Molar mass of weak monoprotic acid = 180 g/mol
Volume of solution = 300 mL
Putting values in above equation, we get:
To calculate the hydrogen ion concentration for given pH of the solution, we use the equation:
We are given:
pH = 2.62
Putting values in above equation, we get:
The chemical equation for the dissociation of weak monoprotic acid (HA) follows:
<u>Initial:</u> 0.0185
<u>At eqllm:</u> 0.0185-x x x
Evaluating the value of 'x'
So, equilibrium concentration of HA = (0.0185 - 0.0024) = 0.0161 M
Equilibrium concentration of = x = 0.0024 M
The expression of for above equation follows:
Putting values in above equation, we get:
Hence, the value of for the given acid is