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
spayn [35]
3 years ago
9

By titration, it is found that 31.7 mL of 0.145 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentrati

on of the HCl solution.
Chemistry
1 answer:
arlik [135]3 years ago
6 0

Answer:

0.184 M

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

HCl + NaOH —> NaCl + H2O

From the balanced equation above, the following data were obtained:

Mole ratio of the acid, HCl (nA) = 1

Mole ratio of the base, NaOH (nB) = 1

Next, the data obtained from the question. This includes:

Volume of the base, NaOH (Vb) = 31.7 mL Molarity of the base, NaOH (Mb) = 0.145 M

Volume of the acid, HCl (Va) = 25.0 mL

Molarity of the acid, HCl (Ma) =?

Finally, we shall determine the molarity of the acid (HCl) as shown below:

MaVa /MbVb = nA/nB

Ma × 25 / 0.145 × 31.7 = 1

Cross multiply

Ma × 25 = 0.145 × 31.7

Ma × 25 = 4.5965

Divide both side by 25

Ma = 4.5965 / 25

Ma = 0.184 M

Therefore, the molarity of the acid (HCl) is 0.184 M

You might be interested in
What is the mass number of an atom which contains 21 electrons, 21 protons, and 24 neutrons?
murzikaleks [220]
45 is the atomic mass of the atom. And the name is Scandium 
7 0
3 years ago
A gas occupies the volume of 215ml at 15C and 86.4kPa?
kherson [118]

Answer:

About 0.1738 liters

Explanation:

Using the formula PV=nRT, where p represents pressure in atmospheres, v represents volume in liters, n represents the number of moles of ideal gas, R represents the ideal gas constant, and T represents the temperature in kelvin, you can solve this problem. But first, you need to convert to the proper units. 215ml=0.215L, 86.4kPa is about 0.8527 atmospheres, and 15C is 288K. Plugging this into the equation, you get:

0.8527\cdot 0.215=n \cdot 0.0821 \cdot 288\\n\approx 7.754 \cdot 10^{-3}

Now that you know the number of moles of gas, you can plug back into the equation with STP conditions:

1V=7.754 \cdot 10^{-3} \cdot 0.0821 \cdot 273\\V\approx 0.1738L

Hope this helps!

3 0
3 years ago
What is the mass of 2.40 moles of magnesium chloride, mgcl2
LiRa [457]

Hey there!

MgCl₂

Find molar mass of magnesium chloride.

Mg: 1 x 24.305

Cl: 2 x 35.453

--------------------  

          95.211 grams

One mole of magnesium chloride has a mass of 95.211 grams.

We have 2.40 moles.

2.40 x 95.211 = 228.5

To 3 sig figs this is 229.

The mass of 2.40 moles of magnesium chloride is 229 grams.

Hope this helps!

4 0
2 years ago
If you had a chance to get a scholarship abroad?what would you do?​
Dovator [93]

Answer:

I Would bc it's the better opportunity

7 0
3 years ago
Read 2 more answers
4 and 5 pls and thank uuu
PtichkaEL [24]

Answer:

4. -ol

5. cyclic ketone

Explanation:

biology stuff

sorry it's hard to explain

5 0
2 years ago
Other questions:
  • What will a bowling ball that is standing still on a table do?
    12·1 answer
  • If the density of Mercury is 1.36 × 10 by 4 Kgm - 3 at 0 degrees. Calculate its value at 100 degrees and at 22 degrees. Take cub
    13·1 answer
  • A 50 g piece of aluminum is heated to 800c and then dropped into cold water, where the metal's temperature drops to 300c.how man
    12·1 answer
  • what were the first living organisms on Earth and how did they change Earth's development and composition?
    15·1 answer
  • Evaluate each scenario described to determine the direction of heat flow.
    8·1 answer
  • A certain reaction is endothermic in the forward direction. The reaction has less moles of gas on the product side. Which of the
    14·1 answer
  • Palmitic acid, derived from palm oil, is one of the most common fatty acids found in butter, cheese, milk, and meat.
    8·1 answer
  • Over the years, the thermite reaction has been used for years to welding railroad nails, in cendiary bombs, and to ignite solid
    8·1 answer
  • How many electrons can the n = 4 shell hold?
    6·2 answers
  • ¿Qué tipos de contaminantes identificamos?¿cuál de ellos tiene mayor concentración de los gases?¿Qué sucedió con la calidad del
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!