I am playing with silver cleaning products. I sent the component list to a friend in Korea ....................
|c12-15 Alcohol Ethoxylate||68131-39-5||11%|
|c11 Alcohol Ethoxylate||34398-01-1||7%|
He claims the pH is 1.5 and wants it to be 2.0.
What can i change to bring it up to at least 2.0?
Take a unit volume [P] of the cleaning product and titrate it to pH 2.0 by using addition of solution [S] of concentration [M] = [A] / [p] , made by dissolving a molar amount [A] of NH4OH into an unit volume [p] of cleaning product.
This way the molar amount [a] of additional NH4OH per unit volume [P] necessary to raise the pH to 2.0 can be calculated using unit volume [s] needed to do this multiplied by concetration [M] = [A] / [p] of solution [S] with minimal alteration to the relative amounts of constituents of the cleaning product.
a = s * M
Adding amount [a] of NH4OH per unit volume [P] of the cleaning product will yield a solution of pH 2.0, while having minimal alteration to the relative amounts of the constituents between the pH 1.5 composition and the composition of pH 2.0 desired can be achieved.
This addition of NH4OH is pretty simple and versatile. Additionally, altering of the original composition is minimal.
Finding the optimal concentration [M] for the solution [S] (used to titritrimetrically determine the required molar amount of NH4OH to be added to reach pH 2.0) might require some experimentation.