0.076 is the initial concentration of sulfurous acid.
Concentrated sulfuric acid is a weak acid (see Acids and Bases) and has relatively few ions at room temperature, resulting in inadequate electrolytes. When it is cold, it does not easily react with common metals such as iron and copper.
[tex]H _2 SO _3 +2NaOH[/tex] → [tex]Na _2 SO _3 +2H _2 O[/tex]
To calculate the attention of acid, we use the equation given through neutralization reaction:
[tex]n_1M_1V_1 = n_2M_2V_2[/tex]
[tex]n_1=2[/tex]
[tex]M_1=?[/tex]
[tex]V_1=25.0 mL[/tex]
[tex]n_2=1[/tex]
[tex]M_2=0.116 mol/L[/tex]
[tex]V_2=32.8 mL[/tex]
Putting values in the above equation, we get:
2 x [tex]M_1[/tex]x 25.0 mL= 1 x 0.116 x 32.8
[tex]M_1 = 0.076096[/tex]
0.076 is the initial concentration of sulfurous acid.
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