I have a mixture of HF/HCl in solution. The concentration should be around 3% HF and 12% HCl. I need an accurate method for differentiating the two different acids. I have found one way that uses 1.6N NaOH to get total acidity. Once total acidity is calculated the HF is titrated with Thorium Nitrate (Th(NO3)4).

The math for this titration isn't making a lot of sense(this is exactly as it reads: **Total acid** = *((titrator Num x 1.6 div. 800) x 3646.1)/sample mass (~200 mg)*

**HF Concentration:*** ((Th(NO3)4 div 800) X 2000.64)/sample mass (mg))*

Question 1.) Does anyone know a titration method for differentiating HF/HCl with out using Thorium nitrate?

Question 2.) If there's not another titration method for this what is the math for achieving total acidity? I know how to calculate normal acid-base titrations with one acid present in solution but have two is confusing. Thank you