All categories

2 years ago

HELP PLZ!!!

Chemistry

1 answer:

Marrrta [24]2 years ago

7 0

The concentration of diluted solution is found to be 0.421 M

Explanation:

It is given that a stock solution (400 ml) should be diluted to 750 ml, we need to find the concentration of the diluted solution using the Law of Volumetric analysis,

V1M1 = V2M2

V1 being the volume of the stock solution = 400 ml

M1 being the molarity of the stock solution = 0.789 M

V2 being the volume of the diluted solution = 750 ml

M2 being the molarity of the diluted solution = ?

Now we have the molarity of the diluted solution by rearranging the above equation as,

M2 = $$\frac{V1M1}{V2}$

Now plugin the values as,

M2 = $$\frac{400 ml \times 0.789 M}{750 ml }$

= 0.421 M

So the molarity of diluted solution is found to be 0.421 M.

You might be interested in

Which of the following is not a form of radiation? Radio waves or sound waves or microwaves or gamma waves

Svetlanka [38]

Sound waves.
Radio waves and Microwaves are non-ionizing radiation. Gamma waves are ionizing radiation

3 0

2 years ago

What is the formula for gunpowder

mrs_skeptik [129]

Here is the chemical equation for gun powder, in it’s simple form:

2 KNO3 + S + 3 C → K2S + N2 + 3 CO2.

This is the same simplified formula, only balanced:

10 KNO3 + 3 S + 8 C → 2 K2CO3 + 3 K2SO4 + 6 CO2 + 5 N2.

3 0

2 years ago

Which list only includes terms that describe water?

Oxana [17]

D! It’s a pure substance and a compound

4 0

2 years ago

Calcium carbonate is often used as an antacid. Your stomach acid is composed of HCl at a pH of 1.5. If you ate toooo much Turkey

stiks02 [169]

Answer: 0.0237 g of calcium carbonate would be required to neutralize the given amount of HCl

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution

$pH=-\log [H^+]$ .....(1)

Given value of pH = 1.5

Putting values in equation 1:

$1.5=-\log[H^+]$

$[H^+]=10^{(-1.5)}=0.0316M$

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

$\text{Molarity of solution}=\frac{\text{Number of moles of solute}\times 1000}{\text{Volume of solution (mL)}}$ .....(2)

We are given:

Volume of solution = 15.0 mL

Molarity of HCl = 0.0316 M

Putting values in equation 2:

$0.0316=\frac{\text{Moles of HCl}\times 1000}{15.0}\\\\\text{Moles of HCl}=\frac{0.0316\times 15.0}{1000}=4.74\times 10^{-4}mol$

The chemical equation for the reaction of HCl and calcium carbonate follows:

$2HCl+CaCO_3\rightarrow H_2CO_3+CaCl_2$

By the stoichiometry of the reaction:

2 moles of HCl reacts with 1 mole of calcium carbonate

So, $4.74\times 10^{-4}mol$ of HCl will react with = $\frac{1}{2}\times 4.74\times 10^{-4}=2.37\times 10^{-4}mol$ of calcium carbonate

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of calcium carbonate = $2.37\times 10^{-4}mol$

Molar mass of calcium carbonate = 100.01 g/mol

Putting values in the above equation:

$\text{Mass of }CaCO_3=(2.37\times 10^{-4}mol)\times 100.01g/mol\\\\\text{Mass of }CaCO_3=0.0237g$

Hence, 0.0237 g of calcium carbonate would be required to neutralize the given amount of HCl

7 0

2 years ago

The electron configuration of an element is 1s22s22p63s1 Describe what most likely happens when an atom of this element comes ne

trasher [3.6K]

Answer:

They will create an ionic bond.

Explanation:

The atom with the one valence electron will lose its one, because it's a metal and metals will lose electrons to become stable. The nonmetal (with 7 valence electrons) will gain that electron, therefore creating a stable octet for the nonmetal, making the compound stable.

3 0

1 year ago