Question 17 (4 marks) (a) Draw the Lewis electron dot structure for the compound, hydrogen fluoride, HF. (1 mark) H F (b) Hydrogen fluoride reacts with water according to the following equationâ¦ HF (l) + H 2 O (l) â H 3 O +(aq) + F â(aq) At room temperature pure hydrogen fluoride exists as a liquid.his shows that water is made up of more than one type of atom. (1 mark) âº The two substances obtained were in definite ratio of 2:1 as shown by the 2:1 ratio of the gas volumes. (1 mark) (ii) State another observation that shows that electrolysis is a chemical change.
Definition of columnist for English Language Learners. : a person who writes a newspaper or magazine column.
from The Century Dictionary and Cyclopedia. 1  To abuse in a lampoon; write lampoons against. 2  n. A sarcastic writing aimed at a person's character, habits, or actions; a personal satire; a sarcastic diatribe; humorous abuse in writing. 3  n. Synonyms Lampoon, Pasquinade, Invective, Satire. The difference between lampoon and pasquinade is not great, but perhaps a lampoon is more malicious, more directly aimed to insult and degrade, while a pasquinade is shorter and of a lighter nature. (See the history of pasquinade, under the definition.