All categories

3 years ago

QUICKKKKK ill do 200+ points next question, how would you produce 1L of a .5 M KF solution, from a stock solution of 1 M KF

Chemistry

1 answer:

suter [353]3 years ago

5 0

Answer:

We will take the 0.5 L from the 1M stock solution of KF inorder to form 0.5 M KF of 1L.

Explanation:

Given data:

Final volume = 1L

Final molarity = 0.5 M

Initial molarity = 1 M

Initial volume = ?

Solution:

Formula:

M₁V₁ = M₂V₂

1 M × V₁ = 0.5 M ×1L

V₁ = 0.5 M ×1L /1 M

V₁ = 0.5 L

We will take the 0.5 L from the 1M stock solution of KF inorder to form 0.5 M KF of 1L.

You might be interested in

Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe): 2H2O2

zalisa [80]

Answer:

23.0733 L

Explanation:

The mass of hydrogen peroxide present in 125 g of 50% of hydrogen peroxide solution:

$Mass=\frac {50}{100}\times 125\ g$

Mass = 62.5 g

Molar mass of $H_2O_2$ = 34 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus, moles are:

$moles= \frac{62.5\ g}{34\ g/mol}$

$moles= 1.8382\ mol$

Consider the given reaction as:

$2H_2O_2_{(aq)}\rightarrow2H_2O_{(l)}+O_2_{(g)}$

2 moles of hydrogen peroxide decomposes to give 1 mole of oxygen gas.

Also,

1 mole of hydrogen peroxide decomposes to give 1/2 mole of oxygen gas.

So,

1.8382 moles of hydrogen peroxide decomposes to give $\frac {1}{2}\times 1.8382 mole of oxygen gas. Moles of oxygen gas produced = 0.9191 molGiven: Pressure = 746 torr
The conversion of P(torr) to P(atm) is shown below:
[tex]P(torr)=\frac {1}{760}\times P(atm)$

So,

Pressure = 746 / 760 atm = 0.9816 atm

Temperature = 27 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T₁ = (27 + 273.15) K = 300.15 K

Using ideal gas equation as:

PV=nRT

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

0.9816 atm × V = 0.9191 mol × 0.0821 L.atm/K.mol × 300.15 K

⇒V = 23.0733 L

8 0

3 years ago

How can i make babies

Studentka2010 [4]

Answer with Explanation:

Babies are formed when the sperm cell from the male testicular gonad meets with the women's egg cell (from the ovaries). This penetration causes the "fertilization process." This naturally occurs two weeks from the woman's last day of menstruation. The fertilization allows the egg to rapidly divide. This is followed by "implantation," a process whereby the blastocyte attaches to the woman's endometrium. Around three weeks, the blastocyte is formed into an embryo. This will be called fetus once the woman reaches its 8th week of pregnancy.

This is a brief process regarding your question on how babies are formed.

8 0

3 years ago

Read 2 more answers

A pale of sand and water

zhuklara [117]

Answer:

I have no idea what you mean.

Explanation:

6 0

3 years ago

Which is the most likely to be reduced? A. Cu2+ B. Fe3+ C. Fe2+ D. Zn2+

SVETLANKA909090 [29]

Answer:

B.) Fe3+ C. Fe2+

Explanation:

4 0

3 years ago

Which of the following is a heterogeneous mixture

marishachu [46]

Heterogeneous Mixtures aren't uniform and are separated in the mixture. They are usually more easily able to be separated. An example is milk and cereal. The cereal isn't uniform because the milk and cereal still are separated and have their own identities. (You can easily just remove cereal from milk using a strainer)

Homogeneous Mixtures are uniform in composition and the multiple elements have become one solution. These mixtures are hard to separate into their components. An example is tap water because it contains water as well as various minerals that can only be separated by performing chemical reactions.

3 0

3 years ago