Unit 4 Topic 5- Acid And Basic Solutions

Question 1

Hydronium ion increase what happens to ph

Answer 1

The ph decrease

Question 2

When more H3O or hydronuim what happens to the concentration

Answer 2

There’s more concentration therefore more acidic solution

Question 3

When identifying a acid base neutral off H3O what amount represents acid

Answer 3

Bigger 1.0 x 10‐⁷

Question 4

When identifying a acid base neutral off H3O what amount represents base

Answer 4

Smaller 1.0x10-⁷ (neutral is exactly 1.0x10-⁷)

Question 5

How do you find the hydronium

Answer 5

[H3O]= 10-ph

2nd log put in the pH as -( the e stands for 10)

Question 6

What are sig digs = to

Answer 6

They’re equal to the numbers represented after the decimal so pH 10.33 the hydronium would have 2 sig dig

Question 7

When you know the sig digs for hydronium how would it correspond to pH

Answer 7

Number of sig digs on hydronium is number Dec on pH

Question 8

How do you find pH from poH

Answer 8

You -14

Question 9

How to find pH from poH

Answer 9

Sub 14 when you add hoth poh and pH it should always add to 14

Question 10

How do you determine what color litmus paper will be when given number

Answer 10

If it’s number on right or higher it’s color on right

If it’s number of left or lower it’s color on left

Question 11

What happens when the number is between the 2 numbers what color will it be

Answer 11

It will be the color if both are mixed

Question 12

When finding range and needs to be higher then 2 numbers and lower then 1 what would range be

Answer 12

Pick the bigger number that it needs to be greater then bc more specific and write on needs to be lower

Question 13

When asking to exact middle pH what do you do

Answer 13

Add both numbers from mid point and divide by 2

Question 14

Why do we need modifications to arrhenious theory

Answer 14

• Because although things don’t have oh when tested in lab sometimes base
  Didn’t explain compounds with polyatiomic ions and H
  Solutions with O

Question 15

What were the 2 new ideas in new arehenious theory

Answer 15

1- there’s collisions with dissolved substances (solute ) and between water because ions can be floating and reacting with water
2- hydronuim ion reacts water molecular forms h30

Question 16

What do acids make

Answer 16

H3O hydronium ion

Question 17

What are bases product

Answer 17

OH

Question 18

When there’s an ionic compound what are steps for writing modified theory

Answer 18

-With ionic you need to first dissociate it
- Then anion from dissiation equations goes into new equation reacts with +H20
-then forms either oh or hydronium depending acid or base (if acid hydrogen lost from compound to make H30)

Question 19

When there’s a molecular compounds how to you write modified theory

Answer 19

You don’t have to dissociate first bc can’t so just write modified theory forms oh base h3O acid

Question 20

When acid so forms h30 what happens to thing reacting with h20

Answer 20

on product side since has h30 don’t write h on new product
And make sure to change the charge on anion to be written more negative ex was - product so now -2 go by compound charge before

Question 21

When base and forms oh what happens

Answer 21

hydrogen will be gained on anion on the product side so write H- and the charge is one more pos then the compound
Ex -2 now -

Question 22

why do strong acids have more hydronium

Answer 22

high acid con and h2O con is and have over 99% reaction so acid concerntration reacts with water over 99% becomes mainly h3O

Question 23

why do weak acids have little h30

Answer 23

start with high acid and water con then when it reacts with water since less 50% little acid changed / consumed produce little h30

Question 24

what makes something a strong base

Answer 24

all soluble OH with metal

Question 25

When strong bases what equation is needed

Answer 25

Just dissociation doesn’t need react with water equation because oh is already there as proof