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Homework: Logarithms

Posljednje ažuriranje over 1 year ago

12

1

Pitanje 10

10.

Convert this number into scientific notation:

A) .00000765 = x 10

Calculate the pH of this amount above using the formula

pH = - log₁₀[H+]:

*if .00000765 is [H+]

B) pH =

The measure of acidity of a liquid is called the pH of the liquid. This is based on the amount of hydrogen ions (H+) in the liquid. The formula for pH is:

pH = −log[H+]

where [H+] is the concentration of hydrogen ions, given in a unit called mol/L (“moles per liter”).

Liquids with a low pH (down to 0) are more acidic and those with a high pH are more basic.

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1

1

Pitanje 12

12.

If the pH of a sample is 3.5. Then what is the [H+] concentration? Use the formula.

pH = −log[H+]

[H+] =

What is the above answer in scientific notation?

x 10

Question 1

00:36

1

Question 2

00:58

1

Question 3

01:33

1

Question 4

01:50

1

Question 5

02:17

1

Question 6

02:24

1

Question 7

02:33

1

Question 8

02:45

1

Question 9

02:58

1

Pitanje 1

1.

Logarithms help us deal with

Drugi mogući odgovor:

factors

math

pi numbers

numbers that are multiplied

centered numbers

cheese and crackers

extremely big or small numbers

Pitanje 2

2.

The logarithm of a number is the

the substitution of that number

the upper and lower part of that number

the coolest part of science

power or exponent of a number

Pitanje 3

3.

What does the calculator button mean?

log to the base of 10

log to the base of 2

log to the natural log

log base... dj hit it

log base 5

Pitanje 4

4.

What is log₂64=

Pitanje 5

5.

pH tells us how a sample is.

Drugi mogući odgovor:

additive or subtractive

kind

blue or red

acidic or basic

fishy and snapply

Pitanje 6

6.

What is the formula for finding pH

pH = log10[H+]

pH = - log₁₀[H+]

pH = force x log10[H+]

pH = 10x[H+]

pH = 50x10[H+]

Pitanje 7

7.

Convert these two amounts to scientific notation:

A) .0000000398 = x 10

B) .00000000398 = x 10

Hint scientific notation:

.098 is 9.8 x 10-2

Pitanje 8

8.

Calculate the pH of these two amounts using the formula.

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A) .0000000398, pH =

B) .00000000398, pH =