The most suitable indicator for the reaction between NaOH and HCOOH is?
bromocresol
methyl orange
methyl red
phenolphthalein
Correct answer is D
Phenolphthalein is suitable as indicator for this reaction i.e strong base and weak acid
carbon(iv)oxide
carbon(ii)oxide
nitrogen
oxygen
Correct answer is A
An acid gas is any gaseous compound which, when dissolved in water, will form an acidic solution
The most common acid gases are hydrogen sulfide (H2S) and carbon dioxide (CO2) gases
ethanoic acid
hydrochloric acid
sodium chloride
sodium hydrogentrioxocarbonate(iv)
Correct answer is B
Low PH means strongly acidic cause acidity increases with decreasing PH values.
Example is Hydrochloric Acid
Vinegar is an aqueous solution of?
Hydrochloric acid
ethanedioc acid
ethanoic acid
hydrofluoric acid
Correct answer is C
Vinegar is an aqueous solution of acetic acid and trace compounds that may include flavorings.
0.05
0.10
2.60
2.80
Correct answer is A
(mass / molar mass) X (1000 / vol )
(0.28 / 56.0) X (1000 / 100 )
= 2.8 / 56
= 0.05 mol\dm\(^3\)