What Is Hno2 Conjugate Base?


What did I do wrong with this chemistry problem?

1) Write the formula of the conjugate base for acid HNO2. I put NO2- and it said it's wrong because its not in the proper format. I made the 2 a subscript already so that's not the issue. 2) What is the name of this conjugate base? I put nitrogen dioxide and it did not accept the answer. 3) Write the formula of the conjugate base for acid H3PO4. 4)What is the name of this conjugate base. I put hydronium and it's wrong

The conjugate base of an acid is formed by removing an H+ ion from it. So, when you remove H+ from HNO2, you get NO2− but not NO2. Therefore, the correct name of the conjugate base of HNO2 is nitrite.

Similarly, the conjugate base of H3PO4 is H2PO4− and its name is dihyrdogen phosphate.

What are the conjugate bases and acids of these?

What are the conjugate bases of these: How do you know how to tell what they are? I couldn't make the numbers small. H2PO4- HNO2 HS- NH3 H2O CH3COOH NH4+ HPO4 2- H2S What are the conjugate acids of these: PH3 HS- PO4 3- NH2- NH3 S2- CO3 2- S2- H2PO4-

arrhenius acids donate a proton (H+)

the conjugate base of an acid is the bit of the acid left after it has lost the H+

H2PO4^- ----> HPO4^2- + H+
the acid --> its conjugate base + H+
the conjugate base of H2PO4^- is HPO4^2-

HNO2 ----> NO2^- + H+
the conjugate base is NO2^-


Arrhenius bases accept protons.
The conjugate acid of an base is the base with an additional H+

PH3 + H+ ----> PH4^+
base + H+ ----> the conjugate acid
PH4^+ is the conjugate acid of PH3

PO4^3- + H+ ----> HPO4^2-
HPO4^2- is the conjugate acid of PO4^3-

What did I do wrong in this chemistry problem?

1) Write the formula of the conjugate base for acid HNO2. I put NO2- and it said it's wrong because its not in the proper format. I made the 2 a subscript already so that's not the issue. 2) What is the name of this conjugate base? I put nitrogen dioxide and it did not accept the answer. 3) Write the formula of the conjugate base for acid H3PO4. 4)What is the name of this conjugate base. I put hydronium and it's wrong.

1.) That is correct, maybe its looking for NO2 1-, the minus or 1- should be superscripted
2.) That is the Nitrite ion
3.) H2PO4 1-
4.) Dihydrogen Phosphate ion

Bronsted-Lowry Acids and Bases?

Select the equation from the list (A-J) which illustrates the acid-base reaction that can take place between each of the following pairs of Bronsted-Lowry acids and bases. acid, H2O; base, CN- acid, HSO4-; base, H2O acid, NH4+; base, HPO42- acid, H2S; base, H2O A. H2O + HSO4- --> H3O+ + SO42- B. H2S + H2O --> HS- + H3O+ C. S2- + H2O --> HS- + OH- D. NH4+ + HPO42- --> H2PO4- + NH3 E. HS- + H2O --> OH- + H2S F. H2S + H2O --> OH- + H3S+ G. H2O + HSO4- --> H2SO4 + OH- H. PO43- + NH4+ --> NH3 + HPO42- I. H2O + CN- --> OH- + HCN J. none of the above and Identify the two conjugate acid-and-base pairs involved in each of the following reactions. HCO3- + HSO4- --> SO42- + H2CO3 SO42- + H2O --> OH- + HSO4- NO2- + HClO4 --> HNO2 + ClO4- PO43- + H3PO4 --> HPO42- + H2PO4- A. [H3PO4 and H2PO4-], [HPO42- and PO43-] B. [H2O and SO42-], [HSO4- and OH-] C. [HSO4- and SO42-], [H2CO3 and HCO3-] D. [HClO4 and ClO4-], [HNO2 and NO2-] E. [H2O and OH-], [HN3 and N3-] F. [H2O and N3-], [HN3 and OH-] G. [HSO4- and HCO3-], [H2CO3 and SO42-] H. [HClO4 and NO2-], [HNO2 and ClO4-] I. [H2O and OH-], [HSO4- and SO42-] J. none of the above Help Please!

acid, H2O; base, CN-
I. H2O + CN- --> OH- + HCN

acid, HSO4-; base, H2O
A. H2O + HSO4- --> H3O+ + SO42-

acid, NH4+; base, HPO42-
D. NH4+ + HPO42- --> H2PO4- + NH3

acid, H2S; base, H2O
B. H2S + H2O --> HS- + H3O+

HCO3- + HSO4- --> SO42- + H2CO3

2nd part...I'm a little confused by how it's set up.
The conjugate acid is the protonated base though, and the conjugate base is the deprotonated acid.

What is conjucate acid and base? ?

Conjugate acids and bases are a pair of formulas that differ only by one hydrogen ion. The formula that has the H+ is the conjugate acid.

H2O and H3O+ ---> H2O is the conjugate base (since it lacks the proton) to H3O+ and H3O+ is the conjugate acid to H2O

H2O and OH- ---> hydroxide is the conjugate base and H2O is the conjugate acid.

Yes, depending on the circumstances, water can be considered an acid or a base.

Here are three phosphate acid base pairs.

H3PO4 / H2PO4^-

H2PO4^- / HPO4^2-

HPO4^2- / PO4^3-

In each pair, the acid is the first one.

Two more:

NH3 / NH2^-

NH4^+ / NH3

Hope this helps.

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