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
Lady_Fox [76]
3 years ago
9

If 42.7 mL of a 0.208 M HCl solution is needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the sol

ution? Ca(OH)2(aq) + 2HCl  CaCl2(aq) + 2H2O(l) g
Chemistry
1 answer:
dolphi86 [110]3 years ago
7 0

<u>Answer:</u> The mass of calcium hydroxide that are present in the solution is 0.3256 grams.

<u>Explanation:</u>

To calculate the moles of a solute, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

We are given:

Volume of hydrochloric acid = 42.7mL = 0.0427 L   (Conversion factor: 1 L = 1000 mL)

Molarity of the solution = 0.208 moles/ L

Putting values in above equation, we get:

0.208mol/L=\frac{\text{Moles of hydrochloric acid}}{0.0427L}\\\\\text{Moles of hydrochloric acid}=0.0088mol

For the given chemical reaction:

Ca(OH)_2(aq.)+2HCl\rightarrow CaCl_2(aq.)+2H_2O(l)

By Stoichiometry of the reaction:

2 moles of hydrochloric acid reacts with 1 mole of calcium hydroxide.

So, 0.0088 moles of hydrochloric acid will react with = \frac{1}{2}\times 0.0088=0.0044mol of calcium hydroxide.

To calculate the mass of calcium hydroxide, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Moles of calcium hydroxide = 0.0044 moles

Molar mass of calcium hydroxide = 74 g/mol

Putting values in above equation, we get:

0.0044mol=\frac{\text{Mass of calcium hydroxide}}{74g/mol}\\\\\text{Mass of calcium hydroxide}=0.3256g

Hence, the mass of calcium hydroxide that are present in the solution is 0.3256 grams.

You might be interested in
Which has the most calories chicken,mashed potatoes, or lettuce?
umka2103 [35]
Chicken has the most calories
7 0
3 years ago
Read 2 more answers
Which of the following answers correctly describes protons?
Andrews [41]
The correct answer is C
3 0
3 years ago
Read 2 more answers
Can Hydrogen hydrogen bond with itself? <br><br> Example:<br> Is H-H a hydrogen bond?
telo118 [61]
It can form dipole-dipole interactions but that’s all
6 0
3 years ago
Easy Chemistry/ Help
Sauron [17]
I’m not really sure what the qn is asking for but if i’m not wrong it should be ‘1’ for each blank!
4 0
3 years ago
What is the formula for Heptaphosphorous pentoxide?
slega [8]

Answer:

P7F8

Explanation:

correct formula isP7F8

7 0
3 years ago
Other questions:
  • Find the mass in 2.6 mol of lithium bromide. (Hint:  You need to write the formula)
    8·1 answer
  • Who were the Native Americans ?
    15·2 answers
  • 50cm3 of a mixture of methane and hydrogen were mixed with excess oxygen and exploded, the product after cooling to the original
    9·1 answer
  • Why does increasing the temperature make a solid dissolve faster?
    11·1 answer
  • The energy level diagram shown below represents a fictional gas. What is the energy of a photon that would move an electron from
    9·1 answer
  • How many grams of H2O will be produced if 8.08x1024 atoms of Fe are produced?
    7·1 answer
  • Acidified solutions of sodium dichromate, K 2 Cr 2 O 7 , and copper (I) bromide, CuBr, are mixed.
    14·1 answer
  • The graph shows the distance an object travel in 11 seconds which answer choice best describes the movement of the object betwee
    15·1 answer
  • Emits huge quantities of light and heat due to the nuclear
    13·1 answer
  • Is aliphatic alcohol hydroxy derivative??​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!