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
lbvjy [14]
3 years ago
7

(1) Some years ago, a crucial experimental error was made during the work-up of the reaction. Instead of adding the reaction mix

ture to the cold acid solution, the inverse addition was carried out. What do you think happened when the acid solution was added to the reaction mixture
Chemistry
1 answer:
bonufazy [111]3 years ago
5 0

Answer:

Salts will be formed and the pH of the new mixture will fall.

Explanation:

What should be: The reaction mixture should be added to the cold acid solution.

The error: Cold acid solution was added to the reaction mixture.

What happens with this?

The neutralization of a solution creates salts. The combination of positive and negative ions in the reaction also forms water. Assuming the pH of the reaction mixture was neutral before the addition of the acid, after the addition of the acid solution the pH will drop. Recall that a neutral solution has a pH of 7. So the pH of this new solution will drop to less than 7 because of the addition of an acid.

If the required procedure for the chemical process was followed, the reaction mixture added to the cold acid would have resulted in a stronger base solution. In other words, the pH of the new solution would be higher.

You might be interested in
Materials of low mass are combined to form a substance of higher mass during ____. a. fission c. both A and B b. fusion d. neith
Andrei [34K]
<h2>The required "option is b) Fusion"</h2>

Explanation:

  • During fission, the nucleus of higher mass is broken down into the nucleus of lower mass in which a high amount of energy is released.
  • During fusion two nuclei combine or fuses to form a larger molecule of higher mass for which a high amount of energy is provided.
  • Therefore, the higher mass of a substance is formed with the combination of lower mass of a substance during the process of fusion.
  • Hence, the required option is Fusion.
7 0
3 years ago
When 3.915 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 12.74 grams of CO2 and 3.913 grams of H
Andre45 [30]

Answer: The empirical formula and the molecular formula of the hydrocarbon is C_2H_3 and C_4H_6 respectivley.

Explanation:

The chemical equation for the combustion of hydrocarbon having carbon, hydrogen and oxygen follows:

C_xH_y+O_2\rightarrow CO_2+H_2O

where, 'x', 'y'  are the subscripts of Carbon, hydrogen

We are given:

Mass of CO_2 = 12.74 g

Mass of H_2O= 3.913 g

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

For calculating the mass of carbon:

In 44g of carbon dioxide, 12 g of carbon is contained.

So, in 12.74 g of carbon dioxide, =\frac{12}{44}\times 12.74=3.474g of carbon will be contained.

For calculating the mass of hydrogen:

In 18g of water, 2 g of hydrogen is contained.

So, in 3.913 g of water, =\frac{2}{18}\times 3.913=0.435g of hydrogen will be contained.  

Mass of C = 3.474 g

Mass of H = 0.435 g

Step 1 : convert given masses into moles.

Moles of C =\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{3.474g}{12g/mole}=0.289moles

Moles of H=\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.435g}{1g/mole}=0.435moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =\frac{0.289}{0.289}=1

For H =\frac{0.435}{0.289}=1.5

The ratio of C : H = 1: 1.5

The whole number ratio will be = 2: 3

Hence the empirical formula is C_2H_3.

The empirical weight of C_2H_3 = 2(12.01)+3(1.008)= 27.04 g.

The molecular weight = 54.09 g/mole

Now we have to calculate the molecular formula.

n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{54.09}{27.04}=2

The molecular formula will be=2\times C_2H_3=C_4H_6

3 0
3 years ago
What happens to the surface of the moon during a total lunar eclipse, when all of Earth's sunrises and sunsets are projected ont
scoundrel [369]

Answer:

It's like the projection of sunrises and sunsets onto the lunar surface

Explanation:

6 0
3 years ago
How much mass is in 100 ml of water
oksano4ka [1.4K]
Since each ml of water weights 1 g, 0.1 liters of water = 100 grams. As well, "kilo" means "thousand". So 1 kilogram (kg) = 1000 grams. This means 100 g = 0.1 kg.
8 0
3 years ago
Ok help it’s for homework
never [62]

Ability to moderate temperatures is not a property of water

4 0
2 years ago
Read 2 more answers
Other questions:
  • What does this mean. What am I supposed to do?
    5·1 answer
  • Structures with oh tend to form what kinds of bonds
    12·1 answer
  • How does the matter and (solar) energy move through the sphere? (Atmosphere)
    14·1 answer
  • Which of the following is not an example of a mechanical wave?
    8·1 answer
  • We can use thin layer chromatography to check if Starbuck coffee has caffeine.<br> True<br> False
    11·1 answer
  • What is the best-known feature of sedimentary
    10·2 answers
  • Circle the element with the LOWER IONIZATION ENERGY.
    6·1 answer
  • Which of the following is NOT a feature found on the Moon?
    15·1 answer
  • In what area of the united states do the fewest people live​
    8·2 answers
  • The phase change that occurs when a liquid goes to a gas?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!