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
ikadub [295]
3 years ago
5

Milk of magnesia is often taken to reduce the discomfort associated with acid stomach or heartburn. The recommended dose is 1 te

aspoon, which contains 4.00×10²mg of Mg(OH)². What volume of an HCl solution with a pH of 1.4 can be neutralized by one dose of milk of magnesia?
Chemistry
2 answers:
Igoryamba3 years ago
6 0

Answer:

8.61 mL of the HCl solution

Explanation:

The reaction that takes place is:

  • 2HCl + Mg(OH)₂ → MgCl₂ + 2H₂O

From the given mass of Mg(OH)₂, we can calculate <u>the moles of HCl that are neutralized</u>:

  • 4x10² mg = 400 mg = 0.400g
  • 0.400g Mg(OH)₂ ÷ 58.32g/1mol = 6.859*10⁻³ mol Mg(OH)₂
  • 6.859*10⁻³ mol Mg(OH)₂ * \frac{1molHCl}{1molMg(OH)_{2}} = 3.429x10⁻³ mol HCl

Finally, to calculate the volume of an HCl solution, we need both the moles and the concentration. We can <u>calculate the concentration using the pH value</u>:

  • pH = -log[H⁺]
  • 1.4 =  -log[H⁺]
  • 10^{-1.4} = [H⁺]
  • 0.0398 M = [H⁺] = [HCl]  *Because HCl is a strong acid*

Thus, the volume is:

  • 0.0398 M = 3.429x10⁻³mol HCl / Volume
  • Volume = 8.616x10⁻³ L = 8.62 mL

____ [38]3 years ago
4 0

Explanation:

The reaction equation will be as follows.

           Mg(OH)_{2} + 2HCl \rightarrow MgCl_{2} + 2H_{2}O

It is given that mass of magnesium hydroxide is 400 mg or 0.4 g (as 1 g = 1000 g). Molar mass of Mg(OH)_{2} is 58.31 g/mol.

Therefore, calculate the number of moles of Mg(OH)_{2} as follows.

             No. of moles = \frac{mass}{\text{molar mass}}

                                   = \frac{0.4 g}{58.31 g/mol}

                                   = 6.85 \times 10^{-3} mol

                                   = 0.00685 mol

Now, moles of HCl = 2 × moles of Mg(OH)_{2}

                               = 2 × 0.00685 mol

                               = 0.0137 mol

Concentration of HCl = 10^{-pH} = 10^{-1.4} = 0.0398 M

Now, we will calculate the volume of HCl as follows.

       Volume of HCl = \frac{moles}{\text{concentration of HCl}}

                                 = \frac{0.0137}{0.0398}

                                 = 0.344 L

or,                             = 344 ml     (as 1 L = 1000 ml)

Thus, we can conclude that 344 ml of an HCl solution with a pH of 1.4 can be neutralized by one dose of milk of magnesia.

You might be interested in
What will happen to the chemical equilibrium if MgCl2 is added? PLEASE HURRY
kari74 [83]

Answer:

a

Explanation:

5 0
3 years ago
Read 2 more answers
You see a worm crawling along the ground and wonder if scientists consider it living or nonliving. Which item below would not be
lisov135 [29]

Answer: a. A worm can move so it must be living.

Explanation:

If a worm is moving it is classified as a moving worm also known to be living if moving.

A worm could reproduce therefore it is living.

Worms do pass dirt into and through there bodies to eat of the minerals and discarding things through and let out.

If you do cut a worm in half it may damage it but since it has basically two heads on girl one boy and cut in half it may split them up, and make damage but they will eventually grow back if the injuries are not severe.

        I Gave Some Facts and I Hope This Will Help!

HAPPY NEW YEAR!

4 0
3 years ago
The polarity of a bond between two elements can be best determined by.
kompoz [17]

The polarity of a bond between two elements can be best determined by difference in the values of electronegativity.

<h3>Determination of polarity of bond</h3>

The polarity of a covalent bond can be determined by determining the difference in electronegativity between the two bonded atoms. Electronegativity is defined as the tendency of an atom to attract electrons to itself.

So we can conclude that the polarity of a bond between two elements can be best determined by difference in the values of electronegativity.

Learn more about polarity here: brainly.com/question/8229259

7 0
2 years ago
Materials move across a cell membrane in a process called _______.
maxonik [38]

Answer:

Diffusion

Explanation:

5 0
2 years ago
Read 2 more answers
LOS AMOOOO 1 AL 40 COMENTÉN​
OleMash [197]

Answer:

0 ni siquiera te conozco

Explanation:

6 0
3 years ago
Other questions:
  • HELP!!! The reversible reaction for the pH indicator bromophenol blue is (C19H8Br4O5S)H– ↔ (C19H8Br4O5S)2– + H+. Write the equil
    5·1 answer
  • Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici
    9·1 answer
  • Question 1 of 10
    12·1 answer
  • 1220 pounds / 1.45 inches =?<br> What do you get when you quadruple 22.34 cm?
    10·1 answer
  • Ammonia can be made by reaction of water with magnesium nitride: __ Mg3N2(s) + __ H2O(l) → __ Mg(OH)2(s) + __ NH3(g) When the eq
    11·1 answer
  • There are many lewis structures you could draw for sulfuric acid, h2so4 (each h is bonded to an o). part a what lewis structure(
    6·2 answers
  • .
    5·2 answers
  • How many moles of oxygen gas is 3.50 L?
    11·1 answer
  • What mass of aluminum must react with 100 g of copper (ii) phosphate? (10g)
    13·1 answer
  • What is the maximum wavelength, in nm, of light that can eject an electron from a metal with Φ =4.25 x 10–19 J?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!