Well, percent ionization, simply allows you to find X which is the change in amount of substance into the final amount, it is dependent on the initial concentration of the substance present that is being dissociated.
For example, if the percent dissociation of CH3COOH is 1.5 % for an initial concentration of 0.15, then to solve for x, you would need to write percent as a decimal and solve.
% dissociation = X/Concentration of substance dissociated
0.015 = X/0.15
X = 0.0025.
Now since you know X, use the ice tables to solve for concentrations of species at equilibrium and plug in Kc expression.
Answer:
SiBr₄= 347.7 g/mol
Explanation:
Gram formula mass:
Gram formula mass is the atomic mass of one mole of any substance.
It can be calculated by adding the mass of each atoms present in substance.
SiBr₄:
Atomic mass of Si = 28.1 amu
Atomic mas of Br = 79.9 amu
There are four atoms of Br = 79.9 ×4
There is one atom of Si = 28.1 × 1
Gram formula mass of SiBr₄:
SiBr₄ = 79.9 ×4 + 28.1 × 1
SiBr₄= 319.6 + 28.1
SiBr₄= 347.7 g/mol
The volume of cylinder is 100 mL, inner diameter is 3.2 cm thus, radius will be:
Volume of layer formed=
...... (1)
Volume of layer is also equal to sum of volume of gasoline and water.
Density of gasoline is 
and mass is 34 g thus, volume of gasoline will be:
Now, density of water is 
and mass is 34 g thus, volume of water will be:
Adding both the volumes, volume of layer will be:
Putting the values in equation (1) to solve for height of the layer,
Thus, height of layer is 10.25 cm
Answer:
8.48 × 10²² atoms of Nitrogen
Explanation:
Calcium Carbonate is an ionic compound made up to Calcium (Ca²⁺) and Nitrate (NO₃⁻) ions. Also, the subscript 2 after the closed bracket after NO₃ specifies that there are two moles of NO₃⁻ in calcium nitrate compound. Hence, in total we can say that this compound contain,
1 atom of Calcium
2 atoms of Nitrogen
6 atoms of Oxygen
Therefore,
When,
1 molecule of Ca(NO₃)₂ contains = 2 atoms of Nitrogen
Then,
4.24 × 10²² molecules of Ca(NO₃)₂ will contain = X atoms of Nitrogen
Solving for X,
X = 2 atoms × 4.24 × 10²² molecule / 1 molecule
X = 8.48 × 10²² atoms of Nitrogen
Answer: Concentration of NaOH calculated will be underestimated.
Explanation:
End point is an observational point , which tells us about the completion of reaction between the titrant (solution in burette) and titre(solution in conical flask) in titration experiment.
In this case , NaOH is titrant whose concentration is unknown.
, 
, 
....(1)
According to question a chemist overshoots the end point and adds to much of NaOH solution, which means increase in the value of 
.
Then the value of 
in equation (1), will get lowered , which means that the concentration of NaOH was lower than that of the actual value. Hence underestimated concentration of NaOH.
