48% sulfuric acid from sodium bisulfate?

Photographer's Formulary sells sulfuric acid in 48%. I tried to substitute sodium bisulfate. I use it to reverse 16mm movie film. 10ml of 48% in a L with 5g Potassium Dichromate is my usual bleach and it works in 5 minuets. How do I use the powder in 5 min? I develop 16mm black and white movie film reversed.

Later, after a nap, I was supposed to use 65g in 1L + the Dichromate.

10 ml of 48% is ~5 ml of concentrated sulphuric acid. You need to use ~22g of sodium bisulphate as the substitute.

Gerald C Koch said:

For every gram of concentrated sulfuric acid or equivalent substitute 2.40 grams of anhydrous sodium bisulfate. If the recipe calls for concentrated sulfuric acid then 1 ml of acid weighs 1.84 grams. Therefore for 1 ml of concentrated acid substitute 4.42 grams of anhydrous sodium bisulfate.

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Agfa-Gaveart reversal process uses the following bleach:
10.0 g potassium dichromate
120 ml 20% by weight sulphuric acid (equivalently 58g of bisulphate)
made up with water pH 1.0
2 min @20C

I've used this bleach for reversal of 35mm roll film and it works fine.

Thank you professor. concentrated sulfuric acid is how concentrated? I have used 48%, so this confused me. And 20% by weight also. Stronger acid should weigh more than weaker acid.