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3 years ago

Calculate the pH of a solution of 0.0050M H2SO4.

1 answer:

4 0

Calculate the Ag+ ion concentration in a saturated solution of Ag2CO3 Ksp=8.1X10^-12

Calculate the pH of a buffer solution that is 1.00 M CH3COOH (acetic acid) and 2.00 M CH3COONa (sodium acetate, a salt) Ka=1.8X-5

The mineral fluorite is composed of CAF2. The molar solubility of calcium fluoride in water is 2.1X106-4
moles/L. what is the Ksp of CaF2?

what ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a pH of 7.20?
Ka(C6H5COOH)=6.5X10-5

You might be interested in

Why is cyanide ion negatively charged?

Bogdan [553]

The cyanide is $CN^{-}$
A carbon atom has 4 valance electrons and nitrogen has 5. Below is a Lewis-dot-structure of cyanide.
:N≡C.
The carbon atom is still one electron short of having a full octet and so it will seize another electron from almost anything, making the cyanide ion negative and whatever it took the electron from it now positive.

8 0

3 years ago

NaOH was titrated to the phenolphthalein endpoint with a known concentration of HCl. The student conducting the experiment place

GarryVolchara [31]

Answer:

The concentration of NaOH solution is 3,65M

Explanation:

The neutralization of NaOH with HCl is:

NaOH + HCl → NaCl + H₂O

You are titrating 12,67 mL HCl 2,74M with your NaOH solution, the moles of HCl in the beaker are:

12,67 mL ≡ 0,01267L× $\frac{2,74 moles}{1L}$ = 0,0347 moles HCl ≡ 0,0347 moles NaOH

The volume that you require for total neutralization of 12,67 mL HCl 2,74M is:

13,65 mL - 4,50 mL = 9,50 mL ≡ 0,0095L

Thus, the concentration of NaOH solution is:

$\frac{0,0347 moles}{0,0095L}$ = 3,65M

I hope it helps!

8 0

4 years ago

If an element has 13 protons, how many electrons are in its outer shell?

stealth61 [152]

There will be three electrons in the outer shell.

7 0

4 years ago

Using Newton’s laws of motion, describe the motion of a roller coaster and analyze the forces acting on the roller coaster at di

Illusion [34]

We can apply Newton's third law of motion in roller coaster.

Explanation:

If we are planning to make a roller coaster with elevations and turn then we need to apply newton’s law of motions, kinetic energy and potential energy.

Newton’s third law of motion says that “ for every action, there is an equal and opposite reaction”. Newton’s third law of motion applies between the tract and ride vehicles.

If we neglect the air resistance and friction, Roller coaster car will always experience two types of forces which are gravitational force and normal force. The normal force is acting perpendicular to the track and gravitational for is also acting downwards.

Whenever the tracts get moving the gravitational force is attracting roller coaster to downward. So this will get accelerates. In the majority of the roller coasters, the hill will decrease with height as the train moves along the tract.

3 0

4 years ago

What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?

UNO [17]

Answer: arrangement of constituent particles makes glass diff. from quartz. Glass-short range order of particles.
Quartz-Long range of particles.

If quartz is heated and cooled rapidly it can be converted to glass.

8 0

2 years ago