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3 years ago

Identify each of the following mixtures as either homogeneous or heterogeneous and as a solution, a

Chemistry

2 answers:

IceJOKER [234]3 years ago

8 0

Answer:

Cranberry Juice is a Homogeneous Solution.

Explanation:

A Homogeneous solution is identifiable as a solution that looks like it is one single fluid.

A heterogeneous solution would be categorized as a solution that is obviously two different compounds, like oil and water.

A colloid is similar to the way a homogeneous solution is identified, however, colloids have particles suspended in them that are 1 nanometer to 1 micrometer in length (If particles are smaller than 1 nanometer it is considered a homogeneous solution). Colloids can be identified by shining a flashlight into them. If the beam disperses, it's a colloid. If it goes straight through without dispersing, it's a homogeneous solution. A colloid example is Milk.

A Suspension is similar to a colloid, however, the particles in a suspension are larger than 1 micrometer. Particles in a suspension can often be seen with the naked eye, whereas Colloid particles cannot. A suspension's particles will often separate from the base solution in time. A suspension example would be shaking glitter up in a bottle of water.

Lady bird [3.3K]3 years ago

4 0

Cranberry juice at the store
(It’s a Homogeneous Solution)

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A 0.050 MM solution of AlCl3 had an observed osmotic pressure of 3.85 atmatm at 20 ∘C . Calculate the van't Hoff factor iii for

alekssr [168]

Answer:

The van't Hoff factor = 3.20

Explanation:

Step 1: data given

Osmotic pressure of a 0.050 M Solution is 3.85 atm

Temperature = 20.0 °C

Step 2:

Osmotic pressure depends on the molar concentration of the solute but not on its identity.

We can calculate the osmotic pressure by:

π = i.M.R.T

⇒ with π = osmotic pressure = 3.85 atm

⇒ with i = van 't Hoff factor = TO BE DETERMINED

⇒ with M = molar concentration of the solution =0.050 M

⇒ with R = gas constant =0.08206 L * atm / mol* K)

⇒ with T = Temperature of the solution =20°C = 293 K

i = π / M.R.T

i = 3.85 / 0.050*0.08206*293

i = 3.20

The theoretical Van't Hoff factor is 4:

AlCl3(aq) → Al^3+(aq) + 3Cl^-(aq)

AlCl3 dissociates in 1 mol Al^3+ + 3 moles Cl-

Due to the interionic atractions the Van't hoff factor is less than the theoretical value of 4

8 0

4 years ago

A gas occupies 3.8 L at -18° C and 975. torr. What volume would this gas occupy at STP?

Aleks04 [339]

To solve the question we will assume that the gas behaves like an ideal gas, that is to say, that there is no interaction between the molecules. Assuming ideal gas we can apply the following equation:

$PV=nRT$

Where,

P is the pressure of the gas

V is the volume of the gas

n is the number of moles

R is a constant

T is the temperature

Now, we have two states, an initial state, and a final state. The conditions for each state will be.

Initial state (1)

P1=975Torr=1.28atm

V1=3.8L

T1=-18°C=255.15K

Final state(2), STP conditions

P2=1atm

T2=273.15K

V2=?

We will assume that the number of moles remains constant, so the nR term of the first equation will be constant. For each state, we will have:

$\begin{gathered} \frac{P_1V_1}{T_1}=nR \\ \frac{P_2V_2}{T_2}=nR \end{gathered}$

Since nR is the same for both states, we can equate the equations and solve for V2:

$\begin{gathered} \frac{P_{2}V_{2}}{T_{2}}=\frac{P_1V_1}{T_1} \\ V_2=\frac{P_{1}V_{1}}{T_{1}}\times\frac{T_2}{P_2} \end{gathered}$

We replace the known values:

$V_2=\frac{1.28atm\times3.8L}{255.15K}\times\frac{273.15K}{1atm}=5.2L$

At STP conditions the gas would occupy 5.2L. First option

8 0

1 year ago

If it requires 37.5 mL of a 0.245 M HBr solution to neutralize 18.0 mL Mg(OH)2, what is the concentration of the Mg(OH) 2 soluti

xenn [34]

2 HBr + Mg(OH) 2 yields Mg(Br) 2 + 2 H2O
M1V1 = M2V2
(0.245 M)(37.5 mL) = (M2)(18.0 mL)
9.1875 = (M2)(18.0 mL)
9.1875/(18.0 mL) = (M2)(18.0 mL)/(18.0 mL)
0.51041
this is not the complete answer as the mol to mol ratio must be considered!
For every 2 mols of HBr there is 1 mole of Mg(OH)2; ratio = 2:1
0.51041 / 2 = 0.25520
M2 = 0.25520
0.25520 M of Mg(OH)2 solution

7 0

4 years ago

What is a family in a periodic table?

igomit [66]

Answer:

A family is a vertical column .

The elements in a family have similar chemical properties.

8 0

3 years ago

If 45.0 liters of oxygen is measured at 24.0C, what would be its volume at standard temperature?

nika2105 [10]

The volume of the oxygen gas at standard temperature is 41.36 liters.