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yanalaym [24]
3 years ago
11

Iron (II) hydroxide, Fe(OH)2, is very insoluble in water. Hence, if it is produced during an aqueous reaction it will precipitat

e from solution. How many grams of sodium hydroxide (a strong base) must be added to 25.2 mL of a 0.605 M aqueous solution of iron (II) nitrate, in order to precipitate all of the iron as Fe(OH)2

Chemistry
1 answer:
leonid [27]3 years ago
3 0

Answer:1.2g of NaOH

Explanation:

First we put down the equation of reaction as shown in the image attached. From the equation of reaction, we can calculate the mass of sodium hydroxide that reacts with one mole of iron II ion according to the balanced stoichiometric equation. Using the information provided about the iron II nitrate, we can calculate the amount of Fe2+ that reacted with sodium hydroxide as shown in the image. Lastly, we use this information to obtain the mass of sodium hydroxide that reacted with the stipulated amount of NaOH.

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Enter your answer in the provided box. For the simple decomposition reaction AB(g) → A(g) + B(g) rate = k[AB]2 and k = 0.20 L/mo
sladkih [1.3K]

Answer:

The answer to the question is;

The concentration of AB, which is written as [AB] after 11.9 s is 0.328 M.

Explanation:

The form of the equation for the second order integrated rate law is

y = mx +b

Where:

y = 1/A

m = k

x = t and

b = 1/A₀

Therefore for the reaction

AB(g) → A(g) + B(g)

rate = k[AB]² and k = 0.20 L/mol·s we have

\frac{1}{[AB]} = \frac{1}{[AB]_0} + kt

Since the initial concentration of AB is [AB]₀ = 1.50 M,

t = 11.9 s

k = 0.20 L/mol·s

we have

\frac{1}{[AB]} = \frac{1}{1.50 M/L} + 0.20 L/(mol)(s)*11.9 s

\frac{1}{[AB]} = 3.047 L/mol

[AB] = 0.328 M

The concentration of AB after 11.9 s is 0.328 M.

3 0
2 years ago
9.
mart [117]

An example of an intensive property of matter is the density of water is 1000 kg/m3. The correct option is C.

<h3>What are intensive properties?</h3>

Intensive properties are those properties that do not depend upon the amount of substance. These properties are density, color, chemical potential, reactivity, etc.

There are two types of properties on the basis of physical quality. They are intensive and expensive. Intensive properties do not depend upon the size and abstraction of the substance.

Thus, the correct option is C. The density of water is 1000 kg/m3.

To learn more about intensive properties, refer to the link:

brainly.com/question/13733851

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8 0
1 year ago
The heat of vaporization, ΔHvap of carbon tetrachloride (CCl4) is 43000 J/mol at 25 °C. 1 mol of liquid CCl4 has an entropy of 2
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Explanation:

(a)    The given data is as follows.

     Temperature (T) = 25^{o}C = (25 + 273) K = 298 K

      \Delta H_{vap} = 43000 J/mol

Since, both the liquid and vapors are at equilibrium. Therefore, change in free energy will be calculated as follows.

      \Delta G_{vap} = \Delta H_{vap} - T \Delta S_{vap} = 0        

            43000 - (298 \times \Delta S_{vap}) = 0

                      \Delta S_{vap} = -144 J/mol K

Negative sign indicates an increase in entropy of the system.

Now, for 1 mole of CCl_{4} is as follows.

     = 144 J/K

So,     S_{vapor} - 214 = 144 J/k

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Therefore, we can conclude that entropy of CCl_{4} vapor is 358 J/K.

(b)  As we know that intensive variable are the variables which do not depend on the amount of a substance.

So, in the given situation only temperature will act as an intensive variable that will be required to completely specify the vapor-liquid mixture of CCl_{4}.

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vfiekz [6]

Answer:

c ammonium hydroxide nh4oh has higher ph value and its a base

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