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
Firdavs [7]
3 years ago
5

How much sodium chloride (NaCl) would need to be added to 750 milliliters of water to make a 15% solution?

Chemistry
1 answer:
oee [108]3 years ago
5 0

Answer: 6.58g

Explanation: We are to find the mass of NaCl that can produce 15% solution in a 750ml

STEP 1:

the reaction moles

NaCl + H2O = NaOH + HCl

Therefore 1mole of NaCl reacts with 1mole of H2O

STEP 2:

convert 750ml to liter

750ml × 1L/1000ml = 0.750L

STEP3 :

convert percentage concentration to mol/L

15% = 0.15mol/L

STEP 4:

find the mole

Mole= concentration× volume

0.15mol/L × 0.75L =0.1125mol

STEP 5 :

Find the mass

Mass = mole × molar mass

The molecular mass of NaCl is 23+35.5= 58.5g/mol

Therefore:

0.1125mol × 58.5g/mol = 6.58g

Approximately: 6.6g

You might be interested in
When calculating the equilibrium constant, aqueous solutes must be expressed in moles per liter (M), and gases must be expressed
alukav5142 [94]

Answer:

B. They are dimensionless ratios of the actual concentration or pressure divided by standard state concentration, which is 1 M for solutions and 1 bar for gases.

Explanation:

Activity of a substance is defined as the ratio of an effective concentration or an effective pressure to a standard state pressure or a standard state pressure. It is usually a unit less ratio.

Concentrations in an equilibrium constant are really dimensionless ratios of actual concentrations divided by standard state concentrations. Since standard states are 1 M for solutes, 1 bar for gases, and pure substances for solids and liquids, these are the units to be used.

Hence, activity is a fudge factor to ideal solutions that correct the true concentration. Activity of a gas and solute concentration is a ratio with no unit.

3 0
3 years ago
A scientific law is like a societal law because
natita [175]
A scientific law is like a societal law because they both are to be abided by their purposed way of doing things
3 0
3 years ago
All solids have fixed: mass volume shape all of the above
Alja [10]
Answer is all of the above. Solids have definite shapes, volumes, and mass. Liquids don't have a fixed shape, but have a fixed volume. Gases have neither a fixed shape, volume, or mass
5 0
3 years ago
Determine the molarity of a solution prepared by dissolving 0.198 g of "KHP" (C8H5O4K) in enough water to make 125 mL of solutio
rosijanka [135]

Answer:

0.007756M KHP; 0.0009695 moles NaOH reacts; 0.03488M NaOH.

Explanation:

Potassium hydrogen phthalate, KHP, is a salt used as standard to determine concentration of basic solutions as NaOH solutions.

To find molarity of the KHP solution we need to convert mass of KHP to moles and divide this in 125mL = 0.125L:

<em>Moles KHP -Molar mass: 204.22g/mol-:</em>

0.198g * (1mol / 204.22g) = 0.0009695 moles KHP

<em>Molarity:</em>

0.0009695 moles KHP / 0.125L = 0.007756M KHP

NaOH reacts with KHP as follows:

NaOH + KHP → Na⁺ + KP⁻ + H₂O

That means 1 mole of NaOH reacts per mole of KHP, that means moles of NaOH that reacts are = Moles of KHP added:

0.0009695 moles NaOH reacts

In 27.80mL = 0.02780L the NaOH was contained. Molarity is:

0.0009695 moles NaOH / 0.02780L =

0.03488M NaOH

4 0
3 years ago
A neutral atom has two, eight, eight electrons in its first, second, and third energy levels. this information ________. does no
olga55 [171]
This info tells us if it stable or not and it tells us how many electrons it need to be stable.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Is kingdom more specific taxon than family?
    11·1 answer
  • Physicist Richard Feyneman used to say, "Science is a way of trying not to
    7·1 answer
  • if a body is in motion at constant speed in a straight line, what, of any, forces could be acting on it
    12·1 answer
  • 3. Did pushing (compression), pulling (tension), or sideways forces (shear) in the rock layers produce the folds and faults?
    5·1 answer
  • In 1901, Thomas Edison invented the nickel-iron battery. The following reaction takes place in the battery. Fe(s) + 2 NiO(OH)(s)
    14·1 answer
  • Below is a proposed mechanism for the decomposition of H2O2. H2O2 + I– → H2O + IO– slow H2O2 + IO– → H2O + O2 + I– fast Which of
    15·1 answer
  • What occurs when potassium reacts with chlorine to form potassium<br> chloride?
    6·1 answer
  • Draw the Lewis structures of N2, O2, H20, and CH4. Compare your drawing to the ones in the drawing on this test and select
    6·1 answer
  • How does publishing in scientific journals help ensure that science leads to
    15·1 answer
  • An element that has 2 core electrons and 3 valence electrons
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!