acronym for “have fun”.

The word aqua is sometimes also used to mean “water,” and in fact the Latin root means “water, the sea, or rain.”

In this page you can discover 98 synonyms, antonyms, idiomatic expressions, and related words for water, like: liquid, H20, aquatic, weewee, aqua pura, sea, piss, pool, hydrous, dam and oasis.

– Hydroelectricity. There are no categorical antonyms for this word.

Hydrofluoric acid

Fluoroantimonic acid

Substances with pH values less than seven are acids, while numbers higher than seven are alkaline. The higher or lower the number, the more acidic or basic a substance is and the more damage it can cause. Alkali burns are the most dangerous.

Ammonia is a weak base because its nitrogen atom has an electron pair that readily accepts a proton. Also, when dissolved in water, ammonia acquires hydrogen ions from water to produce hydroxide and ammonium ions. It is the production of these hydroxide ions that imparts ammonia its characteristic basicity.

The most dangerous alkalis in our homes are oven cleaners and caustic soda (used to unblock drains). Soap and washing up liquid are safe alkalis. Oven cleaner is a very strong alkali which is very corrosive.

So here is a list of substances that are more poisonous than their LD50 values might indicate.

• Botulinum toxins. Even though some of them are used in the cosmetic industry (including in botox), the botulinum family of neurotoxins includes the most toxic substances known to man.
• Snake toxins.
• Arsenic.
• Polonium-210.
• Mercury.

Acids were sharp vinegary substances like lemon juice, while alkalis were soapy substances, like limewater or caustic soda. We also learnt about the pH scale which measures the acidity or alkalinity of a substance. The pH scale goes from 1-14, with pH7 being completely neutral, i.e water.

Lime is an alkaline material and can burn eyes, skin and respiratory tract, and may react violently with water or acids.

around 2.5