Chemistry, 27.03.2020 22:58 neilaamusic6966

A 122mL sample of a 1.2 M sucrose solution is diluted to 500.0 mL. what is the molarity of the diluted solution

Answers: 3

Show answers

Answers

Answer from: ecenteno2004

The molarity of the diluted solution is 0.29 M

From the question,

We are to determine the molarity of the diluted solution.

Using the dilution law formula

M₁V₁ = M₂V₂

Where

M₁ is the initial molarity

V₁ is the initial volume

M₂ is the final molarity

and V₂ is the final volume

From the given information,

M₁ = 1.2 M

V₁ = 122 mL

V₂ = 500.0 mL

Putting the parameters into the formula, we get

$1.2 \times 122 = M_{2} \times 500.0$

∴ $M_{2} = \frac{1.2 \times 122}{500.0}$

$M_{2} = \frac{146.4}{500.0}$

∴ M₂ = 0.2928 M

M₂ ≅ 0.29 M

Hence, the molarity of the diluted solution is 0.29 M

Learn more here: link

Answer from: lucretiak74

0.30M

Explanation:

Let solution 1 be the concentrated solution and solution 2 be the diluted solution

(Molarity x Volume)₁ = (Molarity x Volume)₂

(122ml)₁·(1.2M)₁ = (M)₂·(500ml)₂ => M₂ = 122ml ·1.2M / 500ml = 0.2928M ≅ 0.30M

Answer from: Quest

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

$^{m}_{4}x$ and $^{m}_4y$

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

$^{m}_{5}x^{-}$

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be $^{9}_{5}be^{-}$ and $^{9}_{4}be$ .

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.

Answer from: Quest

the missing options are :

(1) lower boiling point and a lower freezing point(2) lower boiling point and a higher freezing point(3) higher boiling point and a lower freezing point(4) higher boiling point and a higher freezing point

answer : the correct answer is option (3) higher boiling point and a lower freezing point

explanation :

when a non volatile solute is added to a solvent like water, it results in elevation of boiling point.

let us find the increase in boiling point of water when cacl₂ is added to water to make a solution of 1 m

step 1 : find molality of the solution

let us assume we have 1 l of solution.

$m = \frac{moles (solute)}{l ( solution)}$

$1 m = \frac{moles (cacl_{2})}{1 l }= 1 mol cacl_{2}$

let us convert this to grams of cacl₂.

molar mass of cacl2 is 111 g/mol

grams of cacl₂ = $1 mol \times \frac{111g}{mol} = 111 g cacl_{2}$

mass of solute = 111 g

assuming density of solution same as water which is 1g/ml we have ,

mass of solution = density * volume

mass of solution = $\frac{1g}{ml} \times 1000 ml = 1000 g$

mass of solution = mass of solvent + mass of solute

mass of solute = 1000g - 111g

mass of solute 889 g = 0.889 kg

the molality of the solution can be calculated as

$molality = \frac{mol (solute)}{kg ( solvent)}$

$molality = \frac{1mol}{0.889kg}$

molality = 1.12 m

step 2 : find boiling point elevation.

the elevation in boiling point is calculated as

$\bigtriangleup t_{b} = i \times k_{b} \times m$

here δtb = boiling point elevation

i = vant hoff factor which is the number of ions formed by the solute .

cacl₂ dissociates as $cacl_{2} \rightarrow ca^{2+} + 2 cl^{-}$

it forms 3 ions . therefore,

i = 3

m = molality which is 1.12 m

kb is constant for a given solvent. for water it is 0.512

$\bigtriangleup t_{b} = 3 \times 0.512 \times 1.12$

$\bigtriangleup t_{b} = 1.7$

the boiling point of water increases by 1.7 °c

step 3: find freezing point depression.

when a non volatile solute is added to water, it results in decrease in freezing point.

the formula to find freezing point depression is

$\bigtriangleup t_{f} = i \times k_{f} \times m$

kf is constant for water and its value is 1.86

$\bigtriangleup t_{f} = 3 \times 1.86 \times 1.12$

$\bigtriangleup t_{f} = 6.2$

the freezing point of water decreases by 6.2 °c

therefore we can say that, the solution will have a higher boiling point and a lower freezing point

Another question on Chemistry

Chemistry, 22.06.2019 06:30

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.

Answers: 1

Answer

Chemistry, 22.06.2019 11:00

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Answers: 1

Answer

Chemistry, 22.06.2019 18:30

What is the percentage of hydrogen in c2h4

Answers: 1

Answer

Chemistry, 22.06.2019 22:30

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?

Answers: 3

Answer

You know the right answer?

A 122mL sample of a 1.2 M sucrose solution is diluted to 500.0 mL. what is the molarity of the dilut...