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Rufina [12.5K]
3 years ago
15

Does anyone know What does pH= ?

Chemistry
2 answers:
Lesechka [4]3 years ago
4 0
Answer:  Yes.  The pH = 7.6   .
___________________________________________________
Explanation:
____________________________________________________


pH = - log [H⁺]   ; in which, by convention, we assume that there
                            is an implied "base 10" if there is no number listed as a
                            "base" under the "log" sign;

i.e. , " pH = - log [H⁺]⁺ = - log₍₁₀₎ [H⁺] ;
________________________________________________
in which, the:  " [H⁺] " refers to the concentration of hydrogen ions, or " H⁺ " ; in "Molarity" ; that is:  "moles of solutes per Liters of solution", or "mol / L", or "M" .
________________________________________________
Likewise, "pOH = - log [OH⁻] =  - log₍₁₀₎ [OH⁻] " .
________________________________________________
  Note:  pH  + pOH = 14 .
________________________________________________
So, given:  "A solution with 6.4 * 10⁻¹⁰ M  OH (in our problem), find the "pH".
_________________________________________________
   The pOH of the solution is 6.4 .
_________________________________________________
Since pH + pOH = 14 ; 
               we can substitute "6.4" for "pOH" ; and solve for "pH":
_________________________________________________
      pH + 6.4 = 14 ;

        Subtract "6.4" from each side of the equation; to isolate "pH" on one side of the equation; and to solve for the "pH" ;
_________________________________________________
      pH + 6.4 − 6.4 = 14 − 6.4 ;
_________________________________________________
      pH = 7.6   .
_________________________________________________
LiRa [457]3 years ago
3 0
If i am not mistake u can use -log[concentration of oh-] to find it
ie -log[6.4*10^-10]=9.19
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Which method is used to separate the following mixture (a) water + kerosene​
Ad libitum [116K]

Answer:

The separation of kerosene, oil, and water are immiscible liquids, so they can be separated funnel.

8 0
2 years ago
A sample of oxygen gas occupies a volume of 250 mL at .8 atm of pressure. What volume will it occupy at 1.2 atm of pressure?
musickatia [10]
167 mL

P1V1 = P2V2
P1 = .8 atm
V1 = 250 mL
P2 = 1.2 atm

Solve for V2 —> V2 = P1V1/P2

V2 = (0.8 atm)(250 mL) / (1.2 atm) = 167 mL
7 0
3 years ago
What is the theoretical yield of NaBr
dolphi86 [110]

The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles

<h3>Balanced equation </h3>

2FeBr₃ + 3Na₂S → Fе₂S₃ + 6NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

<h3>How to determine the theoretical yield of NaBr</h3>

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

Therefore,

2.36 moles FeBr₃ will react to produce = (2.36 × 6) / 2 = 7.08 moles of NaBr

Therefore,

Thus, the theoretical yield of NaBr is 7.08 moles

Learn more about stoichiometry:

brainly.com/question/14735801

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7 0
2 years ago
If we have 0.06 moles of HCI <br><br> How many grams of magnesium metal is that?
vesna_86 [32]

Answer:

1.44 g

Explanation:

From the question given above, the following data were obtained:

Number of mole of HCl = 0.06 mole

Mass of Mg =?

From the question given above, we discovered the number of mole of HCl is equivalent to the number of mole of Mg. Thus,

Number of mole of Mg = number of mole of HCl

Number of mole of Mg = 0.06 mole

Finally, we shall determine the mass of Mg. This can be obtained as follow:

Number of mole of Mg = 0.06 mole

Molar mass of Mg = 24 g/mol

Mass of Mg =?

Mass = mole × molar mass

Mass of Mg = 0.06 × 24

Mass of Mg = 1.44 g

Therefore, the mass of magnesium is 1.44 g

4 0
3 years ago
Assume you have 4 solids (A, B, C and D) of similar mass. Which of these requires the greatest energy input to melt?
bazaltina [42]

The solid that require the greatest energy input to melt by mass is the option;

Covalent network

Solution Explanation

The elementary particles of a solid are held together by bonds that require an input of energy to unlock, and once broken, the particles are then able to change location within their containing vessels with less restrictions

Polar covalent molecular solids have the following characteristics;

a) Soluble in water b) Low melting point, b) Conduct electricity

Solids that are made up of a covalent network have the following characteristics

a) High melting point temperature b) Non conductive of electricity c) Not soluble in water

Solids of ionic compounds have the following characteristics;

a) High melting point temperature b) The liquid state and solution conducts electricity c) Soluble in water

Solids that have nonpolar covalent bonds have;

a) Low melting point b) Normally in the gaseous or liquid state b) Not water soluble

The covalent network, and the solids ionic compounds require the most energy to melt, however, the strength of the ionic bond in an ionic compound is a factor the charges present and the sizes of the atom, while the covalent network solid, are combined to <em>form essentially as a single molecule</em> and therefore require the greatest heat energy input to melt

7 0
3 years ago
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