Question

hydroxide ion concentration in a cup of tea?

Answer 1

First we need to know the pH of the tea... it can vary greatly but generally it's somewhere around 6.3 or 6.4. Since this is acidic, that means the hydronium ion concentration [H3O+] is greater than the hydroxide ion concentration [OH−]. The approximate concentrations agree with this conclusion:
pH=−log[H3O+]6.3=−log[H3O+]10−6.3=[H3O+] pOH=−log[OH−]pH+pOH=146.3−log[OH−]=14log[OH−]=−7.7[OH−]=10−7.7

Answer 2

thats all i can say hope it helps

Answer 3

got it from here
http://openstudy.com/study#/updates/50d0f7a7e4b0091849d7a1ec

Answer 4

thanks @Macy86

Answer 5

ur very welcome

Answer 6

so the answer would be 2.3? @Macy86

Answer 7

i guess