kramtus51

2022-01-04

By titration, 15.0 mL of 0.1008 M sodium hydroxide is needed to neutra lize a 0.2053-g sample of a weak acid. What is the molar mass of the acid if it is monoprotic?

Ben Owens

Beginner2022-01-05Added 27 answers

Molarity of $NaOH=0.1008M=0.1008mo\frac{l}{L}$

Volume of solution $=15mL=0.015L(1mL=0.001L)$

Using the molarity and volume of the solution, we can determine the moles of NaCl.

$M}_{NaOH}=\frac{mo\le s\text{}NaOH}{litres\text{}so\mathrm{ln}$

$Mo\le s\text{}NaOH=\text{litres soln}timse{M}_{NaOH}$

$=\left(0.015L\text{}so\mathrm{ln}\right)\left(\frac{0.1008mol\text{}NaOH}{1L\text{}so\mathrm{ln}}\right)$

$=0.001512mol\text{}NaOH$

1 mol of NaOH will neutralize 1 mol of $H}^{+$ in a monoprotic acid. So 0.001512mol NaOH will neutralize 0.001512mol $H}^{+$.

1 mol of monoprotic acid contains 1 mol $H}^{+$. So 0.001512mol $H}^{+$ is released by 0.001512mol monoprotic acid.

Moles of monoprotic acid $=0.001512mol$

Mass of the monoprotic acid $=0.2053g$

Using this equation, we can determine the molar mass.

$Mo\le s=\frac{Mass}{Molar\text{}mass}$

$Molar\text{}mass=\frac{Mass}{Mo\le s}$

$=\frac{0.2053g}{0.001512mol}$

$=135.7\frac{g}{m}ol$

Fasaniu

Beginner2022-01-06Added 46 answers

Mol of NaOH $=15.0mL\times \left(\frac{1L}{1000mL}\right)\times \left(\frac{0.1008mol}{1L}\right)=1.51\times {10}^{-3}mol$

$\frac{mass\text{}of\text{}acid}{mol\text{}of\text{}acid}=\frac{0.2053g}{1.51\times {10}^{-3}mol}=135.8\frac{g}{m}ol$

xleb123

Skilled2023-06-14Added 181 answers

fudzisako

Skilled2023-06-14Added 105 answers

22+64

When a cold drink is taken from a refrigerator, its temperature is 5 degree C. After 25 minutes in a 20 degree C room its temperature has increased to 10 degree C. What is the temperature of the drink after 50 minutes?

How many minutes are there in $2\frac{3}{5}$ hours?

Find the answer for $64$ power $\frac{1}{6}$.

The following law describes the relationship between gas volume and pressure: ________. A)Boyle's law; B)Henry's law; C)Charles' law; D)Dalton's law

If an electric switch is open then no current flows through the circuit.

A)True;

B)FalseThe price elasticity of supply of a good is 0.8. Its price rises by 50 per cent. Calculate the percentage increase in its supply.

How many quarts are in 10 gallons?

When the net force acting on an object is zero, the total momentum of the system will:

A)remain constant;

B)increase with time;

C)decrease with time;

D)None of theseHow many centimeters are in four meters?

A notebook computer has a mass of 2.25 kilograms. About how many pounds does the notebook weigh?

If the dot product of two non-zero vectors is zero, then the vectors A)are parallel to each other. B)are perpendicular to each other. C)can have any orientation. D)are anti-parallel to each other.

Which is longer 5 miles or 10 kilometers?

9 grams is how many milligrams?

How to write $673.5$ in scientific notation?