All categories

9 days ago

Calculate the sodium ion concentration when 70.0 mL of 3.0 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.

Chemistry

2 answers:

Anarel [852]9 days ago

7 0

Answer: Sodium ion concentration is 4.5 mole/L

Solution: Here are the details,

Sodium carbonate concentration is 3 mole/L

Sodium bicarbonate concentration is 1 mole/L

Volume of sodium carbonate is 70 ml = 0.07 L (1 L = 1000 ml)

Volume of sodium bicarbonate is 30 ml = 0.03 L

We first need to determine the moles of both sodium carbonate and sodium bicarbonate.

$\text{Moles of }Na_2CO_3=\text{Concentration of }Na_2CO_3\times \text{Volume of }Na_2CO_3=3mole/L\times 0.07 L=0.21mole$

$\text{Moles of }NaHCO_3=\text{Concentration of }NaHCO_3\times \text{Volume of }NaHCO_3=1mole/L\times 0.03 L=0.03mole$

Since sodium carbonate contains 2 sodium ions and sodium bicarbonate has 1 sodium ion, the total moles of sodium ions add up to,

$\text{Moles of }Na^+=[2\times (\text{Moles of }Na_2CO_3)+\text{Moles of }NaHCO_3]=2\times 0.21+0.03=0.42+0.03=0.45moles$

Next, we calculate the sodium ion concentration.

Total volume = 0.07 + 0.03 = 0.1 L

$\text{Concentration of }Na^+=\frac{\text{Moles of }Na^+}{\text{Total volume}}=\frac{0.45mole}{0.1L}=4.5mole/L$

Consequently, the sodium ion concentration is 4.5 mole/L

castortr0y [927]9 days ago

5 0

The resolution for this specific case will be as follows:

The molecular formulas of the two compounds are: Na2(CO3) and Na(HCO3)

3M *.07L =.21mol 
1M *.03L =.03mol

.21mol +.03mol =.45mol Na

Mixing together 30mL and 70mL results in a total volume of 100mL or.1L

Calculating the concentration gives.45mol/.1L = 4.5M

Thus, the concentration of sodium ions amounts to 4.5M. I trust this answer meets your needs, and don't hesitate to reach out with more questions if needed.

You might be interested in

Next we need to determine the mass of oleic acid in the monolayer. The concentration of the oleic acid/benzene solution is 0.02g

Alekssandra [992]

Response:

$m=1x10^{-6}g$

Clarification:

Hello,

In this scenario, since a single drop equates to 0.05 mL of the solution provided, with a concentration of 0.02 g/mL, the mass of oleic acid in one drop calculates to:

$m=0.02\frac{g}{L}*0.05mL*\frac{1L}{1000mL}\\ \\m=1x10^{-6}g$

Best wishes.

3 0

12 days ago

A 3.81-gram sample of NaHCO3 was completely decomposed in an experiment. 2NaHCO3 → Na2CO3 + H2CO3 In this experiment, carbon dio

Anarel [852]

Answer:

The yield percentage of H_2CO_3 is 24.44%

Explanation:

5 0

13 days ago

A characteristic feature of any form of chromatography is the ________.a. calculation of an Rf value for the molecules separated

castortr0y [927]

Answer: The right choice is (c) application of both a mobile phase and a stationary phase.

Explanation:

Chromatography: This refers to a technique for separating a mixture where the mixture is distributed between two phases at varying rates, one being stationary and the other moving.

Mobile phase: The component in which the mixture is dissolved is referred to as the mobile phase.

Stationary phase: This is an adsorbent medium that remains in place while a liquid or gas passes over its surface, thus remaining stationary.

Consequently, a key characteristic of any chromatography technique involves utilizing both a mobile and a stationary phase.

4 0

2 days ago

Which of the following statements is true about the relationships between photon energy, wavelength, and frequency?

KiRa [990]

Answer: The Answer is A.

Explanation:

The energy of a photon is directly related to its electromagnetic frequency, meaning it is inversely related to the wavelength. A higher frequency results in greater energy for the photon. Conversely, a longer wavelength corresponds to lower energy levels.

Hope this Helps!

8 0

3 days ago

Suppose you held a lighted match to a solid hunk of wood and another match to a pile of wood shavings. Which form of wood will c

Tems11 [854]

Answer:

Wood

Explanation:

0 0

4 days ago