Unit 4 Topic 5- Acid And Basic Solutions Flashcards
(25 cards)
Hydronium ion increase what happens to ph
The ph decrease
When more H3O or hydronuim what happens to the concentration
There’s more concentration therefore more acidic solution
When identifying a acid base neutral off H3O what amount represents acid
Bigger 1.0 x 10‐⁷
When identifying a acid base neutral off H3O what amount represents base
Smaller 1.0x10-⁷ (neutral is exactly 1.0x10-⁷)
How do you find the hydronium
[H3O]= 10-ph
2nd log put in the pH as -( the e stands for 10)
What are sig digs = to
They’re equal to the numbers represented after the decimal so pH 10.33 the hydronium would have 2 sig dig
When you know the sig digs for hydronium how would it correspond to pH
Number of sig digs on hydronium is number Dec on pH
How do you find pH from poH
You -14
How to find pH from poH
Sub 14 when you add hoth poh and pH it should always add to 14
How do you determine what color litmus paper will be when given number
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
What happens when the number is between the 2 numbers what color will it be
It will be the color if both are mixed
When finding range and needs to be higher then 2 numbers and lower then 1 what would range be
Pick the bigger number that it needs to be greater then bc more specific and write on needs to be lower
When asking to exact middle pH what do you do
Add both numbers from mid point and divide by 2
Why do we need modifications to arrhenious theory
- 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
What were the 2 new ideas in new arehenious theory
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
What do acids make
H3O hydronium ion
What are bases product
OH
When there’s an ionic compound what are steps for writing modified theory
-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)
When there’s a molecular compounds how to you write modified theory
You don’t have to dissociate first bc can’t so just write modified theory forms oh base h3O acid
When acid so forms h30 what happens to thing reacting with h20
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
When base and forms oh what happens
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 -
why do strong acids have more hydronium
high acid con and h2O con is and have over 99% reaction so acid concerntration reacts with water over 99% becomes mainly h3O
why do weak acids have little h30
start with high acid and water con then when it reacts with water since less 50% little acid changed / consumed produce little h30
what makes something a strong base
all soluble OH with metal
