Question

I need help with 4 chem questions. Please help.
You guys don't have to answer all questions...at least 2 please.

Answer 1

Question 1

Answer 2

answer choices: A) HCl, B)NH4+ C)NH3 D)H20

Answer 3

question 2

What is the pH of a 0.085 M solution of nitrous acid (HNO2) that has a Ka of 4.5 × 10-4?
A. 3.35, b. 4.42, c. 2.21, d. 5.53 My answer is C

Answer 4

@mathmale @Wendy.Ivette11714 @King.Void. @sam141101 @SamsungFanBoy @-SpencerBraz- @AloneS @ganeshie8

Answer 5

Question 3. Given the table of pKa values, at a pH of 4.5, which substance exists predominantly in the protonated form?

Both HCN and HOCl


Only HNO3


Both HNO3 and HSCN


Only HCN

Answer 6

Question 4. What chemical equation represents the ability of a substance to donate a proton in water?

NH3 + H2O --> NH4++ OH-


CH4 + 2O2 --> CO2 + H2O


CH3COOH + NaOH--> CH3COOH + NaCl


CH3COOH + H2O--> CH3COO- + H3O+ (my answer)

Answer 7

can you help?

Answer 8

What is the pH of a 0.085 M solution of nitrous acid (HNO2) that has a Ka of 4.5 × 10-4?
A. 3.35, b. 4.42, c. 2.21, d. 5.53 My answer is C
CORRECT!!

Answer 9

@cuanchi thanks

Answer 10

Question 4. What chemical equation represents the ability of a substance to donate a proton in water?

NH3 + H2O --> NH4++ OH-


CH4 + 2O2 --> CO2 + H2O


CH3COOH + NaOH--> CH3COOH + NaCl


CH3COOH + H2O--> CH3COO- + H3O+ (my answer)

WILL BE MY CHOICE TOO!!

Answer 11

@Cuanchi thanks for confirming those 2.

Answer 12

@Cuanchi are you able to help with the other 2? if not i still appreciate it.

Answer 13

answer choices: A) HCl, B)NH4+ C)NH3 D)H20
THE STRONGEST ACID WILL BE THE MOST DISSOCIATED ONE AND WILL PRODUCE THE BIGGEST AMOUNT OF CONJUGATE BASE A) HCl

Answer 14

oh okay. makes sense. thanks