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
Irina-Kira [14]
3 years ago
7

Usually potassium hydrogen phthalate is kept very pure. But Stu Dent thinks the bottle of potassium hydrogen phthalate has been

accidently mixed with sodium chloride salt. He decides to use a titration to determine the amount of potassium hydrogen phthalate present. He weighs 2.3854 g of the contaminated potassium hydrogen phthalate mixture. The titration uses 17.47 mL of 0.5000 M sodium hydroxide. Use the titration volume and concentration to calculate the moles of potassium hydrogen phthalate actually reacted. Then use the molar mass (204.2 g/mol) to calculate the mass of potassium hydrogen phthalate actually reacted. Enter the mass to 4 significant digits with units of g.
Chemistry
1 answer:
Ahat [919]3 years ago
5 0

Answer:

1.784 g

Explanation:

The equation of the reaction is;

NaOH(aq) + KHC8H4O4(aq) --------> KNaC8H4O4(aq) + H2O(l)

Number of moles of NaOH reacted = 17.47/1000 * 0.5000 M

Number of moles of NaOH reacted =8.735 * 10^-3 moles

From the reaction equation;

1 mole of NaOH reacted with 1 mole of KHC8H4O4

Hence, 8.735 * 10^-3 moles of NaOH reacts with 8.735 * 10^-3 moles of KHP.

So,

Mass of KHP reacted = 8.735 * 10^-3 moles * 204.2 g/mol = 1.784 g

You might be interested in
1. Be able to convert atm’s to kPa’s. (how?)
Whitepunk [10]
1.) 0.875atm x 760.0 mmHg/atm
2.)    8I
        7I                                        0
        6I                                      0
        5I                                    0
        4I                                  0
        3I                                0
        2I--------- 000000000 0I
        1I-0------------------------ I---------------        
         0             50             100           150
                      Boiling point(degrees Celsius)
3.) The warmer the molecules are the faster they move like boiling water the gases are coming out of the water
4.)no clue
5.) A {solution} is always transparent, light passes through with no scattering from solute particles which are the molecule in size. The solution is homogeneous and does not settle out. A solution cannot be filtered but can be separated using the process of distillation.

A {suspension} is cloudy and heterogeneous. The particles are larger than 10,000 Angstroms which allows them to be filtered. If a suspension is allowed to stand the particles will separate out.

<span>A {colloid} is intermediate between a solution and a suspension. While a suspension will separate out a colloid will not. Colloids can be distinguished from solutions using the Tyndall effect. Light passing through a colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible. A hydrocolloid can simply be defined as a substance that forms a gel when it comes in contact with water. Such substances include both polysaccharides and proteins.
6.)</span><span>The random movement of microscopic particles suspended in a liquid or gas, caused by collisions with molecules of the surrounding medium. Also called Brownian motion, molecular movement, pedesis.
hope that helps please mark me as brainly 
</span>
5 0
3 years ago
What is the molar mass of aluminum (Al)
Papessa [141]

Answer:

26.981539 u

Explanation:

One mole of Al atoms has a mass in grams that is numerically equivalent to the atomic mass of aluminum. The periodic table shows that the atomic mass (rounded to two decimal points) of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.

6 0
3 years ago
Read 2 more answers
13._SeClo+ _02 → _SeO2 + _Cl2
natulia [17]

Answer:2,2,2,1

Explanation:

7 0
3 years ago
Read 2 more answers
When using the absolute method to assess muscular endurance, you should adjust the weight according to each individual's strengt
Ghella [55]
I’m pretty sure it’s true I’m not 100% sure tho
3 0
3 years ago
Read 2 more answers
ANSWER THIS AND YOU WILL BE THE BRAINEST!!!!!!!
Alenkasestr [34]
<h3>Answer:</h3>

               Option-B (Halide; oxide) is the correct answer.

<h3>Explanation:</h3>

                  <em> Halides</em> are those substances which contains negatively charged halide ion i.e. X⁻.

Examples:  F⁻ (Fluoride) , Cl⁻ (Chloride) , Br⁻ (Bromide) , I⁻ (Iodide) e.t.c.

                   <em>Oxides </em>are those substances which atleast containn one Oxygen atom.

Examples:  FeO (Iron Oxide), Cr₂O₃ (Chromium Oxide)

                   <em>Silicates</em> are those anionic substances which contains silicon and oxygen with general formula  [SiO. 4−x] n.

Examples: [SiO₄]⁻⁴ (Nasosilicate) , [Si₂O₇]⁻⁶ (Sorosilicates)

                   <em>Carbonates </em>are those substances which contains carbonate anion i.e. CO₃²⁻.

Examples:  Na₂CO₃ (Sodium Carbonate) , MgCO₃ (Magnesium Carbonate)

<h3>Conclusion:</h3>

                   As in NaCaAlF, F⁻ is present hence, it is an Halide and the presence of O in FeCrO makes it Oxide.

5 0
3 years ago
Other questions:
  • Which property increases with increasing atomic number for both the alkali metals and the halogens?
    15·1 answer
  • _Cuo +H, → _Cu + _H,0
    15·1 answer
  • Write the molecular formula for the following compound.<br>​
    9·1 answer
  • Why the mass of a rusted nail is greater than the mass of a nail before it rusted ? Explain
    5·2 answers
  • Please help me and get me the right answer
    10·1 answer
  • As electrons gain more energy they can move ____ away from the nucleus
    15·1 answer
  • Why dil. sulphuric acid cannot be used instead of dil.hcl in lab preparation of carbon dioxide gas?​
    8·1 answer
  • Calculate the energy required to melt 21 g of ice at 0 oC.
    11·1 answer
  • What does Avogadro's law state and what is the formula​
    8·2 answers
  • Any one can you help me with this from 8 to 10 all plz HURRY TO ME
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!