Acidic solutions?

The answers say these compounds form acidic solutions in water: HCl, H2SO4, CH3COOH, SO3, CO2, HNO3, NH3. Can someone tell me how you know they form acidic solutions??

are solutions of the following salts acidic, basic, or neutral? for those that are not neutral, write balanced equations for the reactions causing the solution to be acidic or basic a) KCl b) NH4C2H3O2 c)CH3NH3Cl d)KF e)NH4F f)CH3NH3CN please explain...

Well, I was working on my online homework for Chemistry and im given the pH value of 13.0, and I answered acidic since 13.0 is less than 7,but I do not know why I got it wrong. It was just 10^(-13) and it was less than 7. So, i do not know from there...

Will aqueous solutions of each of the following salts be acidic, basic, or neutral? A) CaCl2 B) KBr C) KHCO3 D) NaHS E) CsI F) (CH3)2NH2Br G) KClO4 H) Na2SO4

Calculate {H+} for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral [OH-]= 5.5x10^-4 find the [H+] in M would this be an acid?

Will aqueous solutions of each of the following salts be acidic, basic, or neutral? A) CaCl2 B) KBr C) KHCO3 D) NaHS E) CsI F) (CH3)2NH2Br G) KClO4 H) Na2SO4 Thanks for the help!

I have to do a worksheet but I just need someone to explain how exactly to balance the equation for an acid and a base. Then I can finish the rest. The problem wants us to Write and balance the oxidation half reaction first, then do the reduction half...