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Chemistry - which has the highest pH?
Equal amounts of four substances are added to separate samples of 100cm^3 of water. Which solution has the highest pH?
a) NaCl
b) AlCl3
c) PCl3
d)Cl2
explanation would be helpful, if you've got time
Thank you!
Thanks guys! if you can i've got some more chemistry questions on my profile, I'll give any answer a thumbs up!
3 Answers
- Old Science GuyLv 71 decade agoFavorite Answer
a) NaCl pH of about 7 - no hydrolysis
b) AlCl3 pH well below 7 - Al ions bind OH ions with hydrolysis
c) PCl3 pH well below 7 - reacts with water to form H3PO4
d)Cl2 pH somewhat less than 7 - reacts with water (slightly) forming HCl and HClO
looks like NaCl wins this bet
- Anonymous4 years ago
you need to locate the moles first. 421mg = .421g moles = .421g / 80.9g = .0.5 mol HBr (grams divided by formula weight) Molarity = .005mol / .240L = .0212M HBr because of the fact it is a powerful acid, it thoroughly dissolves, leaving in ordinary terms H+ ions interior the answer. pH = -log(.021) = a million.sixty seven pH = a million.677
- ?Lv 71 decade ago
NaCl because it will be neutral in aqueous solution i.e, pH = 7
All the other will hydrolyse and produce acidic solution i.e, pH < 7.