acid base need your help?

Question

1. Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?
CH3NH2
NaOH
CO2
Ca(OH)2
CH4

2. Which one of the following substances will give an aqueous solution of pH closest to 7?
KNO3
CO2
NH4I
NH3
CH3NH2

can you guys help me wiff this one. i appreciate that.

Answer 1

1. that is ch3nh2 that is basic botdidnt contain oh-
2.KNO3 is close to 7
cz that made from HNO3 and and KOH
which is trong acid and strong basic
so solutionis more neutral
good luck

Answer 2

i choose to preface my answer by using telling u that u can e mail me with the different questions. this is complicated to respond to all 3 questions, yet ill attempt. a million. we see that H3O+ is the gold standard acid, because of the fact water is an extremely very vulnerable base. thye conjugate of a solid acid is a vulnerable base. the better the acid, the weaker its conjugate. the better the backside, the weaker its conjugate. 2. i recognize for extremely almost beneficial that B(OH)3 is an ACID. frequently, all nonmetal OH's are acids. if u rearrange this formulation, u get H3BO3. i bypass to declare D. 3. to locate the pH of a vulnerable acid, u take the sq. root of Ka x Molarity. on condition that all molarities are a million, take the sq. root of each and every of the Ka's and take the unfavorable log of what u have been given. and the closest one to 7 is the winner. it is going to be the NH4+ i'm hoping this permits.

Answer 3

Here's a tip:

PH > 7 is a basic solution
PH < 7 is an acidic solution
PH=7 is a neutral solution

OH is a base
H30 = H+ is acid

You can do the above problems with this hint and there should be a table in your book with the Ka and Kb values so you can figure this out.