Question

If Shankar's Grandma’s Lux Soap has a hydrogen ion concentration of 9.2 × 10⁽⁻¹²⁾. What is its pH?

Answer 1

Hi ,
pH = - log ( H+ )( base 10 )

Hydrogen ion concentration in Lux

soap = 9.2 × 10^-12

pH = - log ( 9.2 × 10^-12 )

= (-log 9.2 )+ ( - log 10^-12 )

[ Since log ( XY ) = log X + log Y ]

= ( -log 9.2 ) + [ - ( -12 log10 ) ]

[ Since , log mⁿ = n log m ]

= - log 9.2 + 12 × 1

[ Since , log 10 = 1 ]

= - 0.9638 + 12

= 11.0362

I hope this helps you.

: )

Answer 2

HELLO DEAR,

Formula for PH = -log(H+)(base 10)

so, here H+ = 9.2 ×10^{-12}

therefore, PH = -log(9.2 × 10^{-12})

PH = -log(9.2) - log10^{-12}

[as log (m × n) = logm + logm & logx^n = nlogx]

PH = -0.963 - (-12)log10

[log10 = 1]

PH = -0.963 + 12

PH = 11.036

I HOPE ITS HELP YOU DEAR,

THANKS