Acids,bases and salts
The colour of methyl orange in alkaline medium is
Which of the following salts is slightly soluble in water?
6AgNO3(aq) + PH3(g) + 3H2O(I) → 6Ag(s) +H3PO3(aq) + 6HNO3(aq)
In the reaction above, the reducing agent is
The salt formed from a reaction between citric acid and sodium hydroxide in solution will be
The colour change observed when testing for reducing agents using acidified potassium heptaoxodichromate (VI) solution is
yellow to purple
orange to green
green to orange
purple to yellow
The oxidation state of Cr in K2CrO7 is
Lucas reagent is used to test for
What is the pH of a 0.001 mol dm-3 solution of sodium hydroxide?
The basicity of CH3COOH is
0.05 mol dm-3 HCl is neutralized by 25cm3 NaOH. If the volume of acid used is 32.00 cm3, what is the concentration of the base?
0.016 mol dm-3
0.032 mol dm-3
0.039 mol dm-3
0.064 mol dm-3
What weight of NaCl is needed to make 2.0dm3 of a 1.5M solution?
[Na =23, Cl = 35.5]
Tartaric acid is used industrially to
make baking powder
make fruit juice
Calculate the number of moles of HCl present in 20 cm3 of a 0.75M solution of the acid.
The salt formed from a strong acid and a strong base is