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so in this video well be going over how to standardize a solution specifically a solution of sodium hydroxide when a solution is made there are often mitigating factors that may alter the expected concentration for that solution for example sodium hydroxide is hydroscopic and therefore a mass sample thatll be used in a solution may be mostly base but it may also be partly water this causes a misleading amount of sodium hydroxide though usually the concentration of the solution isnt off by that much to deal with this we standardized the solution this means that we determine the concentration of the base more accurately by performing a careful titration of the sodium hydroxide into a known quantity of acid there are a number of acids we could use to do this titration but its best to use one thats a solid at room temperature non-volatile and definitely one thats not hydro scopic potassium hydrogen phthalates or KHP is a great choice as it meets all these requirements plus its a mo