module2 chapter 4

Question 1

Define strong acid

Answer 1

strong acids release all of their hydrogen atoms into a solution as H+ ions and completely dissociates in aqueous solution

Question 2

Define weak acid

Answer 2

Only release a small proportion of its available hydrogen atoms into solution as H+ ions. A weak acid partially dissociates in aqueous solution

Question 3

Define alkali

Answer 3

An alkali is a base that dissolves in water releasing hydroxide ions (OH-) into the solution

Question 4

Define titration

Answer 4

A technique used to accurately measure the volume of one solution that reacts exactly with another solution

Question 5

How do you fill a volumetric flask

Answer 5

So that the bottom of the meniscus just touches the graduation line

Question 6

What are the precautions you must take when calculating the mean titre

Answer 6

Only use your closest accurate titres

By repeating titres until all agree within 0.10cm3 you can reject inaccurate titres

Question 7

the oxidation number of H in metal hydrides

Answer 7

-1

Question 8

oxidation number of O in peroxides

Answer 8

-1

Question 9

oxidation number of O bonded to F

Answer 9

+2