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
Svetach [21]
3 years ago
6

As a technician in a large pharmaceutical research firm, you need to produce 300. mL of 1.00 M a phosphate buffer solution of pH

= 7.36. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as a carboy of pure distilled H2O. How much 1.00 M KH2PO4 will you need to make this solution?
Chemistry
1 answer:
tamaranim1 [39]3 years ago
4 0

Answer:  pH = 7.36. The pKa of H2PO4− is 7.21.

Explanation:

You might be interested in
What is the density of an 820 g sample of pure silicon occupying a 350 cm3 container
vodka [1.7K]

Answer:

2.343 g/ cm³

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Given data:

density = ?

volume= 350 cm³

mass= 820 g

Now we will put the values in the formula,

d= m/v

d= 820 g/ 350 cm³

d= 2.343 g/ cm³

The density of silicon is 2.343 g/ cm³

6 0
3 years ago
2 moles of a gas have a pressure of 2 atm at a temperature of 300 K. What is the volume of the gas?
qwelly [4]
  • No of moles=2mol=n
  • Pressure=2atm=P
  • Temperature=300K=T
  • Volume=V

\\ \tt\hookrightarrow PV=nRT

\\ \tt\hookrightarrow V=\dfrac{nRT}{P}

\\ \tt\hookrightarrow V=\dfrac{2(8.314)(300)}{2}

\\ \tt\hookrightarrow V=8.314(300)

\\ \tt\hookrightarrow V=2494.2mL

\\ \tt\hookrightarrow V=24.94dm^3

4 0
2 years ago
Which statement best describes London dispersion forces?
sineoko [7]

<span>London dispersion forces is the weakest intermolecular force. It is a temporary force that happens when electrons of two adjacent atoms occupy positions that make atoms form dipoles which are temporary dipoles. This is also referred as dipole-dipole attraction.</span>

7 0
3 years ago
When an atom loses electrons it becomes___
murzikaleks [220]
<span>It becomes an </span>ion<span>. An atom that gains a negative electron, it becomes a negative </span>ion<span>. If it loses an electron it becomes a positive </span>ion<span>.</span>

Hope this helps!

8 0
3 years ago
Soils that allow water to pass through them faster are more
Kay [80]
The answer would be permeable because permeable means let's liquid through easily.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which probing question lies within the scope of physics? A. Are fish in the open ocean attracted by underwater sounds? B. Does i
    14·2 answers
  • ●1. What is the density of 2.0 g of a substance that has a volume of 5.0 mL?
    9·1 answer
  • In an acid-base neutralization reaction 38.74 ml of 0.500 m potassium hydroxide (ki) reacts with 50.00 ml of sulfuric acid solut
    15·2 answers
  • Scientists use tiltmeters to locate hidden faults. <br> true or false<br> answer: false
    12·2 answers
  • Which of these are true for the reaction above?
    11·1 answer
  • The concentration of iodide ions in a saturated solution of lead (ii) iodide is __________ m. the solubility product constant of
    11·1 answer
  • Which reaction follows the laws of conservation of matter
    8·1 answer
  • Methanol and ethanol are said to be miscible in one another. What does this tell you?
    10·1 answer
  • What's the difference between viscosity and flow rate
    8·1 answer
  • Helppppppppppppppppppppppppppppp
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!