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a. sodium hypochlorite - I believer its a weak base but im not sure
b. perchloic acid- strong acid?
c. sodium carbonate - strong base???
d. ammonia - weak acid

Im pretty sure the acids are right, not so sure about the bases.

2006-10-16 18:17:34 · 6 answers · asked by farxfromxlonelyx 1 in Science & Mathematics Chemistry

6 answers

a. STRONG base - used in bleach, which is quite corrosive
(right in the middle it has "store in pH 11" http://www.dcchem.co.kr/english/product/p_basic/p_basic11.htm )
b. STRONG acid - don't ever get it near organics!
c. WEAK base - found in detergents to complex ions
d. STRONG base - found in household cleaning agents (its pKa value is over 34, making it quite basic! http://en.wikipedia.org/wiki/Ammonia - right side of page)

usually if it has sodium in it, it is the conjugate base of an acid.
ex) NaCl --> conj. base of HCl (+ NaOH)

2006-10-16 18:32:32 · answer #1 · answered by Anonymous · 0 1

Sodium Hypochlorite -Weak Acid
Perchloric acid- strong acid (very very strong acid)
Sodium Carbonate-weak base
Ammonia-weak base

Here is how you know. Every acid and base has a value associated to it called a pKa value. If the pKa is greater than 7 the compound is a base, but to be a strong base the pKa must be greater than 14. if the pKa is less then 7, then the compound is an acid, and if the pKa is less then 0, then the acid is strong.

Here is a link to several pKa values for your future reference.


Ken

2006-10-17 01:01:57 · answer #2 · answered by Ken B 3 · 0 0

I think you just need to learn them. Hydrioxides are bases. Hydrosomethings (e.g. hydrochloric) are acids. This is because acids have more H+ ions while bases have more OH- ions. However there are more than just them e.g.ethanoic acid/ ammonia( (weak alkali) You know ethanoic acid is a weak acid and it is vinegar and we wouldn't be able to consume it if it was a strong acid

2016-03-28 12:41:36 · answer #3 · answered by Anonymous · 0 0

Ammonia is a stong base! They tell you not to mix it with bleach - a strong acid!!
Sodium Carbonate I would call a weak base.
Perchloric acid - very strong acid
http://en.wikipedia.org/wiki/Sodium_hypochlorite
Nahypochlorite is a tough call, having no proton to donate- I tend towards acid, it is a bleaching agent...
Use wikipedia for chem and physics.

2006-10-16 18:33:49 · answer #4 · answered by Anonymous · 0 1

Hints:

1. Almost all salt based acids and bases are weak.

2. Ammonia is a base.

3. Look at tables of Ks's. If there is one listed, it is weak.

2006-10-16 18:33:32 · answer #5 · answered by Peter Boiter Woods 7 · 0 1

a. Sodium hypochlorite is a weak base. NaClO dissociates in water:

NaClO --> Na+ + ClO-

Then ClO- anions react with water:

ClO- + H2O <==> HClO + OH-, with Kb = 3*10^(-7)

b. HClO4 (perchloric acid) is a strong acid:

HClO4 + H2O --> ClO4(- ) + H3O+

c. Na2CO3 is a weak base. First it dissociates:

Na2CO3 --> 2Na+ + CO3(2-)

Then CO3(-) reacts with water in two stages:

CO3(2-) + H2O <==> HCO3(-) + OH- with Kb = 2.1*10^(-4)
HCO3(-) + H2O <==> H2CO3 + OH- with Kb = 2.4*10^(-8)

d. NH3 is a weak base

NH3 + H2O <==> NH4 + OH- with a Kb = 1.8*10^(-5)

2006-10-18 00:02:53 · answer #6 · answered by Dimos F 4 · 1 0

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