The formula for hydrogen sulfate is HSO4-.
To determine this formula using the criss-cross method, we first write the symbols for the ions involved: H+ and SO42-.
Next, we criss-cross the charges of the ions to obtain the subscripts in the formula. The charge of H+ is +1 and the charge of SO42- is -2, so we criss-cross these to get H2SO4.
However, hydrogen sulfate actually has one more negative charge than sulfate (SO42-) because of the presence of the hydrogen ion. Therefore, we add one negative charge to the formula by putting the H in parentheses and adding a subscript of 1 outside: HSO4-.
Hydrogen Sulphate formula by criss cross method
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