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IrinaK [193]
2 years ago
3

Suppose 0.09886 M KOH is titrated into 15.00 mL H2SO4 of unknown concentration until the equivalence point is reached. It takes

a total volume of 29.25 mL KOH to neutralize the H2SO4. What is the concentration of the acid? Express the result to the proper number of significant figures based on the limits of data from the problem.
Chemistry
2 answers:
Hatshy [7]2 years ago
3 0
The chemical reaction between KOH and H2SO4 is:
2KOH + H2SO4 ⇒K2SO4 + 2H2O

According to the formula, at the end point where equivalence point is reached, the molar ratio between the reacted KOH and H2SO4 is 2:1. Based on this ratio, the concentration of the H2SO4 can be calculated.  Because all the measurement has 4 significant figures, we need to keep 5 significant figures during the calculation and 4 significant figures for the final answer.

The moles of KOH reacted is: 0.02925 L * 0.09886 M = 0.0028917 mole.
Based on the 2:1 ratio, the moles of H2SO4 in the solution is 0.0028917mole/2 = 0.0014458 mole.
So, the concentration of H2SO4 is: 0.0014458mole/0.01500L = 0.09639 mole/L, or 0.09639M.
alisha [4.7K]2 years ago
3 0

Answer:

0.0028917 for the first one and 0.0014458 for the second. Hope this helps!

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The isolated atoms cannot prevail in a hybridized state as the atom in an isolated state do not form any kind of bond with the other atom, due to which the atomic orbitals do not go through the process of hybridization.  


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2 years ago
Titanium has five common isotopes: 46Ti (8.0%), 47Ti (7.8%), 48Ti (73.4%), 49Ti (5.5%), 50 Ti (5.3%). What is the average atomic
zhannawk [14.2K]
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2 years ago
Consider a 20.0 % (m/v) solution. how can this be written as a conversion factor?
White raven [17]
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4 0
2 years ago
3) Calculate the percent by mass of 3.55 g NaCl dissolved in 88 g water.
kotykmax [81]

Answer:

The percent by mass of 3.55 g NaCl dissolved in 88 g water is 3.88%

Explanation:

When a solute dissolves in a solvent, the mass of the resulting solution is a sum of the mass of the solute and the solvent.

A percentage is a way of expressing a quantity as a fraction of 100. In this case, the percentage by mass of a solution is the number of grams of solute per 100 grams of solution and can be represented mathematically as:

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In this way it allows to precisely establish the concentration of solutions and express them in terms of percentages.

In this case:

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Replacing:

Percentbymass=\frac{3.55}{91.55}*100

Percent by mass= 3.88%

<u><em>The percent by mass of 3.55 g NaCl dissolved in 88 g water is 3.88%</em></u>

5 0
2 years ago
A sample of gas (1.3 mol) occupies __________ l at 22 °c and 2.5 atm.
Furkat [3]
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Then the volume should be:

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4 0
2 years ago
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