Were, we're, and where sound similar but have different meanings and uses in sentences.. In informal language, we often use where, when or why to introduce defining relative clauses instead of at which, on which or for which.

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Hydrochloric Acid, 50 (v/v), Aqueous Solution, APHA, Spectrum Chemical, Quantity
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Where is this argument leading?. You use where to ask questions about the place something or someone is in, or is coming from or going to.