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A chemist weighs out 0.0865 g of sulfurous acid, H2SO3, which is a diprotic acid into a 250. mL of volumetric flask and dilutes

kobusy [5.1K]

<u>Answer:</u> The volume of NaOH needed to add is 12.35 mL

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

Given mass of sulfurous acid = 0.0865 g

Molar mass of sulfurous acid = 82.079 g/mol

Volume of solution = 250 mL

Putting values in above equation, we get:

$\text{Molarity of sulfurous acid}=\frac{0.0865\times 1000}{82.079\times 250}\\\\\text{Molarity of sulfurous acid}=0.0042M$

To calculate the volume of base, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2SO_3$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=2\\M_1=0.0042M\\V_1=250mL\\n_2=1\\M_2=0.1700M\\V_2=?mL$

Putting values in above equation, we get:

$2\times 0.0042\times 250=1\times 0.1700\times V_2\\\\V_2=\frac{2\times 0.0042\times 250}{1\times 0.1700}=12.35mL$

Hence, the volume of NaOH needed to add is 12.35 mL

3 0

4 years ago

63. Sewage sludge is applied as a fertilizer to agricultural land. The heavy metal cadmium, Cd, is often found in small amounts

Anika [276]

Answer:

B

Explanation:

In the attached file

3 0

3 years ago

In calculating the concentration of [Cu(NH3)4]2+ from [Cu(H2O)4]2+, the stepwise formation constants are as follows: K1=1.90×104

pashok25 [27]

Answer:

Kf = 1.11x10¹³

Explanation:

The value of Kf for a multistep process that involves an equilibrium at each step, is the multiplication of the constant of the equilibrium of each step.

Kf = K1xK2xK3xK4

Kf = 1.90x10⁴ x 3.90x10³ x 1.00x10³ x 1.50x10²

Kf = 1.11x10¹³

4 0

3 years ago

Find the volume of 200g of benzene, if the density of benzene is 0.88 g/mL.

Lina20 [59]

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question we have

$volume = \frac{200}{0.88} \\ = 227.2727...$

We have the final answer as

Hope this helps you

7 0

3 years ago

How many atoms are in 33 g of titanium (ti)? 22 ti 47.88 titanium

dmitriy555 [2]

Atomic mass Ti = 47.867 a.m.u

47.867 g ---------------- 6.02x10²³ atoms
33 g --------------------- ??

33 x ( 6.02x10²³) / 47.867 => 4.15x10²³ atoms

Answer D

hope this helps!

6 0

4 years ago

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