The two chemical species formed by chlorine in water, hypochlorous acid (HOCl) and hypochlorite ion (OCl â ) are commonly referred to as âfreeâ or âavailableâ. Hypochlorous acid is a weak acid and will disassociate: HOCl âH+ + OCl â.
An appositive is a phrase, usually a noun phrase, that renames another phrase or noun. A noun phrase is a group of words taking the job of a noun in a sentence. Noun phrases consist of the main noun and any modifiers. For example, 'yellow house', 'high school teacher', and 'the large dog' are all noun phrases. Here is an example of a sentence using a one word appositive to rename another noun.
Expressions such as yes, phew, and indeed are examples of interjections. Often, an interjection will sit at the start of the sentence but not always. It is normal practice to offset an interjection with a comma (or commas if it's in the middle of the sentence). In the examples below, the interjections are shaded: