Question

fill in the blanks to balance this chemical reaction.
__ h2so4 + nano2 → hno2 + __ na2so4

Explanation:

Step1: Balance sodium atoms

Let the coefficients be \(a\), \(b\), \(c\), \(d\) for \(H_2SO_4\), \(NaNO_2\), \(HNO_2\), \(Na_2SO_4\) respectively. The chemical equation is \(aH_2SO_4 + bNaNO_2
ightarrow cHNO_2 + dNa_2SO_4\).
For sodium (\(Na\)): \(b = 2d\).

Step2: Balance sulfate ions

For sulfate ion (\(SO_4^{2 - }\)): \(a=d\).

Step3: Balance nitrate ions

For nitrate ion (\(NO_2^{-}\)): \(b = c\).

Step4: Balance hydrogen atoms

For hydrogen (\(H\)): \(2a=c\).
Let \(a = 1\), then \(d = 1\), \(b=2\), \(c = 2\).

Answer:

\(1H_2SO_4+2NaNO_2
ightarrow2HNO_2 + 1Na_2SO_4\)