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. 2019 Dec 9;5(12):e02926. doi: 10.1016/j.heliyon.2019.e02926

Table 6.

Scientific and financial information for the preparation of acid solutions.

Reagent certified for analysis Hydrochloric acid Sulfuric acid
Purity 37% 95%
Density 1.18 1.83
Molar mass (g/mol) 36.5 98.078
25L in plastic container: cost in euros 361 410
Normality 11.96 35.45
Volume of acid solution necessary for the production of 1 kg bleaching clay 5L (HCl,1N) 5L (H2SO4, 1N) 5L (H2SO4, 2N)
Volume of pure acid (mL) 418 141 282
Cost of pure acid (euros) 6.03592 2.31 4.62