1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
padilas [110]
3 years ago
9

When 70. milliliter of 3.0-molar Na2CO3 is added to 30. milliliters of 1.0-molar NaHCO3 the result­ing concentration of Na+ is 2

.0 M
Chemistry
1 answer:
tiny-mole [99]3 years ago
6 0

Answer : The resulting concentration of Na^+ ion is, 4.5 M

Explanation : Given,

Concentration of Na_2CO_3 = M_1 = 3.0 M = 3.0 mol/L

Volume of Na_2CO_3 = V_1 = 70 mL = 0.07 L

Concentration of NaHCO_3 = M_2 = 1.0 M = 1.0 mol/L

Volume of NaHCO_3 = V_2 = 30 mL = 0.03 L

First we have to calculate the moles of Na_2CO_3 and NaHCO_3

\text{Moles of }Na_2CO_3=\text{Concentration of }Na_2CO_3\times \text{Volume of }Na_2CO_3=3.0mol/L\times 0.07L=0.21mol

and,

\text{Moles of }NaHCO_3=\text{Concentration of }NaHCO_3\times \text{Volume of }NaHCO_3=1.0mol/L\times 0.03L=0.03mol

Now we have to calculate the moles of Na^+ ions.

As, 1 mole of Na_2CO_3 will give 2 moles of Na^+ ions

So, 0.21 moles of Na_2CO_3 will give 2\times 0.21=0.42 moles of Na^+ ions

and,

As, 1 mole of NaHCO_3 will give 1 mole of Na^+ ions

So, 0.03 moles of NaHCO_3 will give 0.03 moles of Na^+ ions

So,

Total number of moles of Na^+ ions = 0.42 + 0.03 =0.45 mole

Total volume of both solution = 70 mL + 30 mL = 100 mL = 0.1 L

Now we have to calculate the concentration of Na^+ ions.

\text{Concentration of }Na^+=\frac{\text{Moles of }Na^+}{\text{Volume of solution}}=\frac{0.45mol}{0.1L}=4.5mol/L=4.5M

Therefore, the resulting concentration of Na^+ ion is, 4.5 M

You might be interested in
The range in size of most atomic radii is approximately what?
Nastasia [14]
It is approximately 10 ^ -10
3 0
3 years ago
In a living organism, what is an organ? functional unit, or building block, of all organisms; smallest unit that can carry on th
ra1l [238]

Answer: D. a structure that provides a specific service within a cell​

Explanation:

7 0
2 years ago
What mass of HBO2 is produced from the<br> combustion of 139.5 g of B2H6?<br> Answer in units of g.
aliina [53]

Answer:

m_{HBO_2}=441.8gHBO_2

Explanation:

Hello there!

In this case, since the combustion of B2H6 is:

B_2H_6+3O_2\rightarrow 2HBO_2+2H_2O

Thus, since there is 1:2 mole ratio between the reactant and product, the produced grams of the latter is:

m_{HBO_2}=139.5gB_2H_6*\frac{1molB_2H_6}{27.67gB_2H_6} *\frac{2molHBO_2}{1molB_2H_6} *\frac{43.82gHBO_2}{1molHBO_2}

m_{HBO_2}=441.8gHBO_2

Best regards!

5 0
2 years ago
You push on the side of a toy truck rolling along the floor. What will happen to the motion of the truck?
sergeinik [125]

Answer:

The direction will be changed .

Explanation:

According to the principles of motion, if an object is moving with solitary velocity and if an external force is applied to it, then that force changes the position, speed, and direction of that object.

In the given question, an external force is being applied to the toy which will change the direction of that toy.

3 0
3 years ago
The boiling point of a substance is tested. After 10 tests, the result is given as 37+/−3°C. Which conclusion can be drawn from
VMariaS [17]

Answer:

Explanation:

The actual boiling point is probably between 34C and 40C.

6 0
2 years ago
Read 2 more answers
Other questions:
  • If there are many forces acting on an object how can the net force be 0
    8·1 answer
  • Which of the following is fact-based science rather than part of a belief system
    13·2 answers
  • Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts
    6·1 answer
  • Is blue color a physical change
    13·2 answers
  • How many grams of hydrogen has will be produced from the reaction of zinc metal with 85 grams of hydrochloric acid?
    13·1 answer
  • What type of properties change ina physical change? Give an example to support your answer?
    15·1 answer
  • Which measurement is a vector?
    5·1 answer
  • What do electric forces do​
    15·1 answer
  • Can someone help me PLEASE
    12·1 answer
  • Four students wrote different analogies to describe an electron before the formation of an ionic bond . Student A: A tug of war
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!