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
Rashid [163]
3 years ago
14

Cho 4g CuO vào dung dịch axit clohidric 10% thì phản ứng vừa đủ.

Chemistry
1 answer:
Sholpan [36]3 years ago
8 0

Answer:

Explanation:

a. CuO+ 2HCl⇒CuCl2+ H2O

b. n_{CuO}= \frac{4}{80}= 0,05 (mol)

⇒n_{CuCl2}= n_{CuO}=0,05 mol

⇒m_{CuCl2}= 0,05×135=6,75 (g)

c. n_{HCl}=2× n_{CuO}=0,1 (mol)

⇒m_{HCl}= 0,1×36,5= 3,65 (g)

⇒m_{dd HCl}= \frac{m_{HCl}}{10}×100=36,5 (g)

⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=\frac{m_{CuCl2} }{m_{dd HCl+ m_{CuO} } }×100=\frac{6,75}{36,5+4} ×100≈ 16,67%

You might be interested in
If you toward the right of the periodic table is it harder or easier to remove valence electrons?​
attashe74 [19]

Answer:

harder

Explanation:

3 0
3 years ago
Read 2 more answers
Answer to A please! ASAP
Tanya [424]
The answer is electron
5 0
3 years ago
The pH of a solution that is formed by the neutralization of 1.0M H2SO4(aq) and 1.0 M KOH(aq) is closest to
pshichka [43]

Answer:

b) 7

Explanation:

The pH of a solution produced by the neutralization reaction between 1M of H₂SO₄ and KOH with 1M is closest to 7.

pH is a standard for measuring the acidity and alkalinity of a solution. A solution that is acidic will have a pH less than 7, a neutral solution will have pH of 7 and a basic solution will have pH greater than 7.

What is a neutralization reaction?

  • It is an acid-base reaction in which hydrogen and hydroxide ions combines to form water.
  • Also a salt results from the combination of the other ions.

In this reaction a base simply neutralizes an acid and the solution becomes neutral before it goes into completion.

Therefore, a neutral solution will have pH of 7 or close to it.

3 0
3 years ago
When there is a chemical reaction between hydrochloric acid and potassium hydroxide. Which substances are the reactants? Which s
Tasya [4]

Answer:

Good question i really dont know sorry

Explanation:

jhjhhshhjjjh

3 0
2 years ago
Read 2 more answers
Plants and algae that convert sunlight to food energy are called
borishaifa [10]
The correct answer is the first choice given. Plants and algaes are producers. They are called as such since they produce their own food by using the energy from the sun, CO2 and water to form glucose as their food.
8 0
3 years ago
Other questions:
  • Why are water molecules polar? select one:
    6·1 answer
  • What systems are responsible for moving the gases oxygen and carbon dioxide?
    14·1 answer
  • An automobile tire at 30°C has a pressure of 3.00 atm. Temperature decreases to -5°C. Assume that there is no volume change in t
    13·2 answers
  • HELP PLZ!!! A sample contains only the compound CaCl2 and water. When it is dried, its weight decreases from 5.00g to 4.24g. Wha
    7·2 answers
  • What evidence do you have that the slope of the natural logarithm plot will be the same for all ions of the same charge, and not
    7·1 answer
  • Read the given equation. 2Na + 2H2O → 2NaOH + H2
    10·2 answers
  • Let me know the answer to this oneeee
    13·1 answer
  • Which of the following stars is most likely to be red?
    12·2 answers
  • I need help on science lol
    11·2 answers
  • You titrate 25.00 ml of 0.1894 M acetic acid with 0.2006 M NaOH. How many ml of NaOH (to four significant figures) will be requi
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!