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
zalisa [80]
3 years ago
8

It was calculated that 4.3mL of 0.417 M HCl is required to titrate 11.9 mL of 0.151 M Mg(OH)2. Show evidence 2 HCl(aq) + Mg(OH)2

(aq) → + MgCl2(aq) + 2 H2O(l)
Chemistry
1 answer:
Lapatulllka [165]3 years ago
4 0

Answer:

See explanation.

Explanation:

Hello,

In this case, for the described chemical reaction:

2 HCl(aq) + Mg(OH)2(aq) → MgCl2(aq) + 2 H2O(l)

We can notice there is a 2:1 molar ratio between the moles of hydrochloric acid and magnesium hydroxide, therefore, at the equivalence point:

n_{HCl}=2*n_{Mg(OH)_2}

And in terms of volumes and concentrations we verify:

V_{HCl}M_{HCl}=2*V_{Mg(OH)_2}M_{Mg(OH)_2}

So we use the given data to proof it:

4.3mL*0.417M=2*11.9mL*0.151M\\1.793=3.594

Therefore, we can conclude the data is wrong by means of the 2:1 mole ratio that for sure was not taken into account. This is also supported by the fact that normalities are actually the same, but the nomality of magnesium hydroxide is the half of the hydrochloric acid normality since the acid is monoprotic and the base has two hydroxyl ions.

Best regards.

You might be interested in
Explain why even though it may be sunny outside its not as warm during the summer ​
Lapatulllka [165]

For part of our orbit the northern half of Earth is tilted toward the Sun. This is summer in the northern hemisphere; there are longer periods of daylight, the Sun is higher in the sky, and the Sun's rays strike the surface more directly, giving us warmer temperatures.

5 0
3 years ago
Read 2 more answers
Pls help!!!!!
erica [24]

Answer:

moving i think! Hope this helps

Explanation:

3 0
3 years ago
Read 2 more answers
Help meeeeeeee??????????​
kolbaska11 [484]

Answer:

njjii

Explanation:

uujhhhjhhhthnjkk

5 0
3 years ago
A piece of wood near a fire is at 23°c. it gains 1,160 joules of heat from the fire and reaches a temperature of 42°c. the speci
Alex73 [517]

The mass of the piece of wood is 35.58 g.

Joule = M × T × C

Where, M = mass

T = change in temperature(42C-23C=19 C)

C = specific heat capacity = 1.716 joules/gram

Substituting the values in the equation,

1160 = M × 19 × 1.716

M = 1160/32.604 = 35.58 g

Therefore, the mass of the piece of wood = 35.58 g

<h3>What is meant by specific heat capacity?</h3>

A material's specific heat capacity, which is defined as its heat capacity divided by its mass, determines how much energy is required to increase a gram's temperature by one degree Celsius (or one Kelvin)

<h3>What is mass?</h3>

Mass is the quantity of matter in a physical body.

To learn more about specific heat capacity visit:

brainly.com/question/1747943

#SPJ4

7 0
1 year ago
An element's atomic mass does not include the mass of its <br> Electrons <br> Protons <br> Neutrons
klio [65]
  Mass  of  electrons  are not  included when  calculating  the  atomic  mass  of   element.  Atomic  mass  of  the   element  is  equal  to   proton  +  neurons.  Example  the    the  mass  number  of  Nitrogen can   be  calculated as      7 protons  +  7  neutrons  to  give 14 .  thus  nitrogen  has  a  mass  number  of  14
4 0
4 years ago
Other questions:
  • Which particles have the same mass?
    6·1 answer
  • What function does residual CO2 serve
    7·1 answer
  • In the formate ion, hco2− which of the atoms in the ion have pπ orbitals?
    5·1 answer
  • what is the concentration of 10.00ml of HBr if it takes 16.73 mL of a 0.253M LiOH solution to neutralize it?
    7·1 answer
  • The correct formula for sodium oxide is?
    15·1 answer
  • How much heat in j is giving out when 85.0g of lead cools from 200.0 c to 10.0c
    6·1 answer
  • A compound is 150.86 g carbon, 8.86 g hydrogen, and 20.10 g oxygen by
    12·1 answer
  • Need help please I need to select one element for each following families on the periodic table
    14·1 answer
  • Why melting and boiling points can be used as a way to check purity?​
    12·1 answer
  • Alan has been driving 20 mph for the last half hour. The truck next to him has been there for a while now, so Alan is
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!