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
const2013 [10]
3 years ago
6

Using the initial concentration and volume values from Trial 1 of Table 1, fill in the following chart of new concentration valu

es (in Molarity) for the following reactants:

Chemistry
1 answer:
AURORKA [14]3 years ago
8 0

Based on the volume and concentration of the solutions given;

  • Molarity of KBrO3 = 0.02 M
  • Molarity of Na2S2O3 = 0.05 M
  • Molarity of KBrO3 = 0.02 M
  • Molarity of Na2S2O3 = 0.05 M

<h3>What is molarity?</h3>

Molarity of a solution is the concentration of the solution given as number of moles of solute in a given volume of solution in litres.

  • Molarity = number of moles/volume in Litres

The molarity of each of the solutes in the solution are as follows:

Flask A:

Total volume = 15 mL = 0.015 L

moles of KI = 0.01 M × 0.005 L = 0.00005 moles

moles of Na2S2O3 = 0.001 M × 0.005 = 0.000005 moles

Molarity of KI = 0.00005 moles/0.015 L

Molarity of KI = 0.0033 M

Molarity of Na2S2O3 = 0.000005 moles/0.015 L

Molarity of Na2S2O3 = 0.00033 M

Flask B:

Total volume = 10 mL = 0.001 L

moles of KBrO3 = 0.04 M × 0.005 L = 0.0002 moles

moles of HCl = 0.1 M × 0.005 = 0.0005 moles

Molarity of KBrO3 = 0.0002 moles/0.01 L

Molarity of KBrO3 = 0.02 M

Molarity of Na2S2O3 = 0.0005 moles/0.01 L Molarity of Na2S2O3 = 0.05 M

Learn more about molarity at: brainly.com/question/17138838

You might be interested in
2. A sample of neon gas has a volume of 87.6 L at STP. How many moles are present?
PSYCHO15rus [73]

Answer:

                      3.91 moles of Neon

Explanation:

According to Avogadro's Law, same volume of any gas at standard temperature (273.15 K or O °C) and pressure (1 atm) will occupy same volume. And one mole of any Ideal gas occupies 22.4 dm³ (1 dm³ = 1 L).

Data Given:

                 n = moles = <u>???</u>

                 V = Volume = 87.6 L

Solution:

               As 22.4 L volume is occupied by one mole of gas then the 16.8 L of this gas will contain....

                          = ( 1 mole × 87.6 L) ÷ 22.4 L

                          = 3.91 moles

<h3>2nd Method:</h3>

                     Assuming that the gas is acting ideally, hence, applying ideal gas equation.

                              P V  =  n R T      ∴  R  =  0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹

Solving for n,

                              n  =  P V / R T

Putting values,

                              n  =  (1 atm × 87.6 L)/(0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹ × 273.15K)

                              n  =  3.91 moles

Result:

          87.6 L of Neon gas will contain 3.91 moles at standard temperature and pressure.

7 0
3 years ago
If a bonding pair of electrons is unequally shared between two atoms, the bond is
joja [24]
The answer is D. And if it is equally shared it is nonpolar covalent bond
4 0
4 years ago
Read 2 more answers
You wish to add 5 mg/l naocl as cl2 to a solution in a disinfection test, and you have a stock solution (household bleach) that
Alecsey [184]

Answer: -

0.1 ml of bleach should be added to each liter of test solution.

Explanation:-

Let the volume of bleach to be added is B ml.

Density of stock solution = 1.0 g/ml

Mass of stock solution = Volume of stock x density of stock

                                     = B ml x 1.0 g/ml

                                     = B g

Amount of NaOCl in this stock solution = 5% of B g

                                     = \frac{5}{100} x B g

                                     = 0.05 B g

Now each test solution must be added 5 mg/l NaOCl.

Thus each liter of test solution must have 5 mg.

Thus 0.05 B g = 5 mg

                        = 0.005 g

B = \frac{0.005}{0.05}

  = 0.1

Thus 0.1 ml of bleach should be added to each liter of test solution.

4 0
3 years ago
A period is a horizontal row on the periodic table. <br> a. True<br> b. False
Kay [80]
It is True because in the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.
6 0
3 years ago
________ are molecules whose general structure includes a central carbon with a carboxyl group, an amine group, a hydrogen molec
IgorLugansk [536]

The amino acids are the molecules where we can found the carboxyl group (-COO^{-}), amino group (-NH_{2}), hydrogen atom (H) and a residual R-group. On the structure of the residual R-group the name of the amino acid depends. Like if R is hydrogen (H) the amino acid is alanine; If R- group is a phenyl group i.e. -C_{6}H_{5}, the compound is called phenyl alanine. The structure of the general amino acid skeleton can be shown as-

5 0
3 years ago
Other questions:
  • Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant is left
    14·1 answer
  • Which of the following is the best definition of a scientific theory? A predicted experimental outcome A mathematical model (an
    12·1 answer
  • The pH indicator bromothymol blue is blue in an alkaline solution and yellow
    9·1 answer
  • How to solve the equation for the value of X
    12·1 answer
  • Hardness of metals can be decreased by: (a) adding interstitial alloying elements (b) making glassy metals through extremely hig
    15·1 answer
  • When ice is melting, the heat being added causes:
    9·2 answers
  • More True Or False Questions ​
    8·1 answer
  • What could have caused the mass to be higher than the initial mass​
    12·2 answers
  • WHAT CAN BE USED TO REPLACE OIL? help 30POINTS!!!!! ASAP
    14·2 answers
  • 2.Please study the figures below which illustrate the steps in the chemical reaction of fluoromethane (CH3F) with a hydroxide io
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!