# chemisrty

what is the strongest acid here?

H2SO3
H2SO4
H2SeO3
H2SeO4

For oxyacids, the acidity increases with increasing number of oxygen atoms; therefore, H2SO3 and H2SeO3 will be weaker than either H2SO4 or H2SeO4. We have a problem determining which is the stronger of H2SO4 or H2SeO4. Atoms that are larger tend to have larger acid strengths and those with increasing electronegativity of the central atom tend to be less acidic. Se is slightly larger but both have about the same electronegativity. Does your text and/or your notes list ionization constants. If so, look them up. Both acids are strong acids; therefore, their first ionization is 100% so k1 will not be listed. But k2 is a weak acid (not ionized 100%) but is still relatively large as K2s go. I looked up k2 for H2SO4 and H2SeO4 and both are listed at 1.2E-2.

1. 👍
2. 👎
3. 👁

## Similar Questions

1. ### Chemistry

Write the acid-dissociation reaction of nitrous acid (HNO2) and its acidity constant expression.

2. ### Chemistry

net ionic equation to show that sulfurous acid, H2SO3, behaves as an acid in water. I got this answer but do not know if it is correct. H2SO3 + H2O --- H3O + SO I am Not sure if its is tri/mono/diprotic

3. ### Chemistry

1. As the strength of a weak acid increases, the proportion of ions to molescules increases or decreases? ... I think that it will increase. Is this right? 2. As the as the concentration of a weak acid increases, the pH...

4. ### Chemistry

Calculate pH and concentration of H2SO3, H2SO3- and SO32- in NaHSO3 c=0,05M. Ka1= 1,23*10^(-2) Ka2= 6,6*10^(-8) Results attached are: a) [H2SO3]= 1,04x10-4 M, [SO32-]=1,3x10-4 M, [HSO3-]= 0,05 M but i keep getting different

1. ### pcc

A volume of 40.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 21.7mL of 1.50 M H2SO4 was needed? The equation is

2. ### Chemistry

Calculate the concentrations of H2SO3, H3O+, HSO3-, and SO32- in a 0.025 M H2SO3(aq) solution

3. ### chem

rank strongest acid to weakest acid? rank strongest acid to weakest acid H3CNH2 CH3C (triple bond) CH CH2=CHCH3 H20 CH4 i tried to rank them using the Pka values but I couldn't find the pKa value of the alkyne and I thought the

4. ### chemistry

Which of the following is a conjugate acid-base pair? A. H2SO4, H2SO3 B. NH3, NO2 C. CH3OH, CH3COOH D. HF, H2F E. NH3, NH4+

1. ### Chem

A beaker containing 25.0 mL of 0.360 M H2SO4 spills on the counter. How much baking soda, NaHCO3, will be needed to neutralize the acid? H2SO4 (aq) + 2 NaHCO3 (s) -> Na2SO4 (aq) + 2 H2CO3 (l) GIVEN: - I've converted 25.0 mL to

2. ### Chemistry

Given the following acid dissociation constants, which acid has the strongest conjugate base? a. HCN Ka = 6.2 x 10-10 b. HOCl Ka = 3.0 x 10-8 c. HIO3 Ka = 0.17 I believe the answer is HCN it has the lowest Ka and is the weakest

3. ### chem

What are the equilibrium concentrations of H2SO3, H+, HSO3−, and SO32−in a 0.050 M solution of sulfurous acid H2SO3 at 25 oC? For H2SO3 at 25 oC, Ka1 = 1.5×10−2 and Ka2 = 1.0×10−7

4. ### Chemistry

Elemental sulfur can be converted to sulfur dioxide by combustion in air. Sulfur dioxide will react with water to form sulfurous acid (see balanced equation below). SO2(g) + H2O(l) → H2SO3(l) What mass of sulfur dioxide is