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spayn [35]
2 years ago
5

What is the final acetate ion concentration when 69. g Ba(C2H3O2)2 is dissolved in enough water to make 970. mL of solution? The

molar mass of Ba(C2H3O2)2 is 255.415 g/mol.
0.28 M
0.64 M
0.91 M
0.20 M
0.56 M
Chemistry
1 answer:
Alexeev081 [22]2 years ago
8 0

Answer:

<em><u></u></em>

  • <em><u>0.56M</u></em>

Explanation:

<u />

<u>1. Dissociation equation</u>

<u />

Assuming 100% dissociation, the equation is:

  • Ba(C₂H₃O₂)₂    →   Ba²⁺   +   2C₂H₃O₂⁻

                                                          ↑

                                                    acetate ions

<u>2. Molarity</u>

<u />

Calculate the molarity, M, of the solution:

  • M = n / V(in liters)

  • n = mass in grams / molar mass

  • n = 69.g / 255.415g/mol = 0.27015 mol

  • M = 0.27015mol / 0.970liter = 0.27850 mol/liter ≈ 0.28M

<u>3. Acetate ions</u>

From the chemical equation, 1 mol of dissolved Ba(C₂H₃O₂)₂ produces 2 acetate ions in solution.

Thus, 0.28 mol/liter × 2 = 0.56 mol/liter = 0.56M ← answer

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The pressure of a 609.64 gram sample of F2 in a 88.84 L container is measured to be 2770.96 torr. What is the temperature of thi
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Answer : The temperature of the gas is, 245.9 K

Explanation :

To calculate the temperature of gas we are using ideal gas equation:

PV=nRT\\\\PV=\frac{w}{M}RT

where,

P = pressure of gas = 2770.96 torr = 3.646 atm

Conversion used : (1 atm = 760 torr)

V = volume of gas = 88.84 L

T = temperature of gas = ?

R = gas constant = 0.0821 L.atm/mole.K

w = mass of gas = 609.64 g

M = molar mass of F_2 gas = 38 g/mole

Now put all the given values in the ideal gas equation, we get:

(3.646atm)\times (88.84L)=\frac{609.64g}{38g/mole}\times (0.0821L.atm/mole.K)\times (T)

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Therefore, the temperature of the gas is, 245.9 K

4 0
2 years ago
For a ternary solution at constant T and P, the composition dependence of molar property M is given by: M = x1M1 + x2M2 + x3M3 +
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Answer:

M_{i} = M_{i} + C_{xjxk} (1-2x_{i}) ...1

M^{\alpha } = M_{i} + CX_{xjxk}          ...2

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The ternary constant is given by the following equation:

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M_{i}  = [\frac{d(nM)}{dn_{i} }]_{P,t,n,j}

This is the rate at which property  X  changes with the amount of species  i  added to the mixture as the temperature, the pressure, and the amounts of all other species are kept constant.  A partial molar quantity is an intensive state function.  Its value depends on the temperature, pressure, and composition of the mixture.

In a multi phase system (in this case, a ternary system), the components resolved give:

M_{i} = M_{i} + C_{xjxk} (1-2x_{i})

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5 0
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Likurg_2 [28]

Answer:

The correct option is the first option

Explanation:

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While, The total mass number on the product side is 100 + 2(1) = 102

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The <u>atom with the atomic number 54 is Xenon</u>,

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5 0
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