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
Ede4ka [16]
2 years ago
7

Imagine you had HCl with a concentration of exactly 0.10 mol/dm3. If 0.023 dm3 of a sodium hydroxide solution, NaOH (aq), could

exactly neutralize 0.040 dm3 of the HCl solution, what is the concentration of the NaOH (aq)
Chemistry
1 answer:
polet [3.4K]2 years ago
8 0

Answer:

Explanation:

Step 1: Calculate the amount of sodium hydroxide in moles

Volume of sodium hydroxide solution = 25.0 ÷ 1,000 = 0.0250 dm3

Rearrange:

Concentration in mol/dm3 =

Amount of solutein mol = concentration in mol/dm3 × volume in dm3

Amount of sodium hydroxide = 0.100 × 0.0250

= 0.00250 mol

Step 2: Find the amount of hydrochloric acid in moles

The balanced equation is: NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

So the mole ratio NaOH:HCl is 1:1

Therefore 0.00250 mol of NaOH reacts with 0.00250 mol of HCl

Step 3: Calculate the concentration of hydrochloric acid in mol/dm3

Volume of hydrochloric acid = 20.00 ÷ 1000 = 0.0200 dm3

Concentration in mol/dm3 =

Concentration in mol/dm3 =

= 0.125 mol/dm3

Step 4: Calculate the concentration of hydrochloric acid in g/dm3

Relative formula mass of HCl = 1 + 35.5 = 36.5

Mass = relative formula mass × amount

Mass of HCl = 36.5 × 0.125

= 4.56 g

So concentration = 4.56 g/dm3

You might be interested in
In this experiment, simple chemical reactions are used to generate small quantities of hydrogen and
victus00 [196]

One of the industrial method for the production of hydrogen is the steam reforming process while oxygen is air separation.

<h3>Industrial method of hydrogen preparation </h3>

One of the industrial method for the production of hydrogen is the steam reforming process also known catalytic steam–hydrocarbon process.

In  catalytic steam–hydrocarbon process, gaseous or vaporized hydrocarbons are treated with steam at high pressure over a nickel catalyst at 650°–950° C to produce carbon oxides and hydrogen.

<h3>Industrial method of oxygen preparation </h3>

One of the industrial method of oxygen production is the separation of air using either a cryogenic distillation process or a vacuum swing adsorption process.

Learn more about hydrogen production here: brainly.com/question/25597694

#SPJ1

6 0
2 years ago
Krypton has a higher melting point than argon because of its:
dezoksy [38]
<h3>Answer:</h3>

             Krypton has a higher melting point than argon because of its stronger dispersion forces.

<h3>Explanation:</h3>

                   Dispersion forces also known as London Dispersion forces are found in non polar compounds. These interactions take place in two steps.

Step 1: Instantaneous Dipole:

                                                  In non polar compounds the electron density on atom is symmetrical. When these symmetrical atoms approaches second symmetrical atom, a disturbance in electron densities occur due to repulsion between electrons. Due to repulsion the electrons density change there position and for a small period of time and instantaneous dipole is produced on an atom.

Step 2: Induced Dipole:

                                         The dipole produced in step one when approaches another symmetrical atom, the partial positive part (low electron density site) attracts the electron from symmetrical atom and induces polarity in it. In this way the non polar atoms become polar and interacts with each other.

<h3>Factors Effecting Strength of Dispersion Forces:</h3>

i) Size of Atom / Molecule:

                                           Greater the size of an atom greater will be the dispersion forces and vice versa.

ii) Shape of Molecules:

                                      Greater the branching on molecule, weaker will be the dispersion forces and vice versa.

<h3>Conclusion:</h3>

                  As the size of Krypton is greater than Argon therefore, it will have stronger dispersion forces and will melt at higher temperature than Argon.

5 0
3 years ago
what is the minimum mass of ethylene glycol that must be dissolved in 14.5 kg of water to prevent the solution from freexing at
lbvjy [14]

Answer:

The minimum mass of ethylene glycol = 6.641 Kg

Explanation:

\Delta T_f= T_f-T_f'\\T_f'=T_f-\Delta T_f

Where T_f = freezing point of pure solvent water, 0°C

T_f'= Freezing point of solvent after mixture

K_f = Freezing point depression constant = 1.86 °C/m

Moecular weight of ethylene glycol = 60 g/mol

Weight of ethylene glycol = 14.5 Kg= 14.5×10^3 g

molality of ethylene glycol

m = \frac{weight}{mol.wt} \times\frac{1000}{V}

Substitute the values to calculate m

m = \frac{w}{60} \times\frac{1000}{14.5\times1000}

by formula

0-(-14.2) =1.86\frac{w}{60} \times\frac{1000}{14.5\times1000}

calculating we get w = 6641.93 g

Therefore, The minimum mass of ethylene glycol = 6.641 Kg

4 0
2 years ago
C6H6 es organico o inorganico y porque
Luda [366]
<h2>organico</h2>

  • El benceno es un hidrocarburo aromático, de fórmula molecular C6H6. Es un líquido incoloro a temperatura ambiente. Se convierte fácilmente en vapor o gas, siendo por tanto un Compuesto Orgánico Volátil (COV).
6 0
3 years ago
Will make brainliest
grandymaker [24]
A.
Increases

When a pressure increases the density usually increases too

4 0
2 years ago
Other questions:
  • How many quantum numbers are used to describe the properties of electrons in atomic orbitals?
    15·1 answer
  • How many milliliters of 1.50 M magnesium sulfate soulution is required to supply 2.50 mole of this salt?
    15·1 answer
  • Need help for number 4. do i use the q=mc DELTA T equation or the q=mHfusion?
    6·1 answer
  • Which of the following describes the excess reactant in a chemical reaction?
    8·1 answer
  • Why is water classified as a renewable resource?
    8·2 answers
  • What is the importance of standardization in chemistry​
    15·1 answer
  • Which of the following describes an element? Choose all that apply.
    13·1 answer
  • The reaction between potassium metal and water produces potassium hydroxide and hydrogen gas.
    7·1 answer
  • Complete the following statements to describe solids, liquids, and gases. Select the correct answer from each drop-down menu.
    5·1 answer
  • Atoms with the same number of protons but different masses (from different numbers of neutrons) are called:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!