Question

I know this is chemistry
1) How do I know if a molecule is a strong, weak, or non electrolyte?

2) How do I know if some salt will increase/decrease pH?

Answer 1

Okay, the 3 things that makes water or whatever liquid are acid, base and salt.

Answer 2

The definition of 'pH' is the quantity of H+ and OH- in a substance

Answer 3

1) solubility. if's it's one of the seven strong acids or a strong base (it has group 1 or 2 ions) then its' strong. if it doesn't dissolv ein water, then its non. all else is weak
2) salt willl incrrease ph if it contains an ion that makes a strong acid. it the ion makes a strong bases (like OH-) then its a strong base

Answer 4

Let's take water, \(H_2O\), it behaves as an acid AND a base.

Answer 5

@cerezas, salt doesn't increase nor decrease the pH.

Answer 6

only if it's a neutral.
some compounds do

Answer 7

Explain to me how magnesium chloride increases or decreases the pH?

Answer 8

zepp will you awnser my first question too

Answer 9

ok but take a salt with a fluoride ion

Answer 10

Yes, special salt like alkali salt or acid salt, but generally, salt doesn't increase nor decrease water's pH, do you agree?

Answer 11

sure
but saying never is misleading and since it's a genchem question also intellectually a bad idea

Answer 12

how do you know if ts soluble?

Answer 13

http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

Answer 14

I do agree :)

And for 1, my answer would be strong if what you are solving is an ions only molecules.

Answer 15

solubility rules. learn them love them live them they will take you far

Answer 16

xD

Answer 17

And for 2) we were talking about the acid salt such as the baking soda, \(NaHCO_3\) which is slightly acidic, and alkali salt, such as sodium carbonate, \(Na_2OH_3\), which is slightly basic.

Answer 18

Actually, I'm not sure if Na2OH3 is slightly or strongly basic D:

Answer 19

i would guess strong but it's been years since chem so don't tale my word for it
you;re better of going with something with an ammonium ion

Answer 20

Haha, I guess he got the idea :P

Answer 21

so whats the awnser

Answer 22

for 2

Answer 23

You might need to go back to read again :)

Answer 24

does salt not change? right

Answer 25

http://puu.sh/w5vl
Only Acid and Alkali salt changes the pH.

Answer 26

how do you determine Ammonia electrolyte?