Comments on: acids or bases? and pH measurements? http://www.the-coffee-cup.com/9714/acids-or-bases-and-ph-measurements/ Premium Coffee For Less... Sat, 12 Nov 2011 13:31:55 +0000 hourly 1 http://wordpress.org/?v= By: pisgahchemist http://www.the-coffee-cup.com/9714/acids-or-bases-and-ph-measurements/comment-page-1/#comment-34373 pisgahchemist Wed, 24 Mar 2010 15:51:16 +0000 http://www.the-coffee-cup.com/9714/acids-or-bases-and-ph-measurements/#comment-34373 Ok. I'll buy that you can measure the pH of vinegar (it's acetic acid, with a pH of about 4) and bleach, since it is sodium hypochlorite and is basic, and the pH is probably around 8 to 10. But the rest of these??? Pardon me, but it's nonsense to estimate the pH of a piece of spinach or a dinner plate, or an oven mitt. pH is a measure of the hydrogen ion concentration in a solution. Therefore you need a solution. Last time I checked, an oven mitt is not a component of an aqueous solution. Ok. I’ll buy that you can measure the pH of vinegar (it’s acetic acid, with a pH of about 4) and bleach, since it is sodium hypochlorite and is basic, and the pH is probably around 8 to 10.

But the rest of these??? Pardon me, but it’s nonsense to estimate the pH of a piece of spinach or a dinner plate, or an oven mitt.

pH is a measure of the hydrogen ion concentration in a solution. Therefore you need a solution. Last time I checked, an oven mitt is not a component of an aqueous solution.

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