Question

I need fast help please!!
If vodka is 9.81 M in ethanol what is the molarity of ethanol in a drink that was made by mixing 47.0 mL of vodka in enough fruit juice to make 6.06 fl oz ( 1 fl oz =29.33 mL

Answer 1

@UnkleRhaukus

Answer 2

What is the total volume of the drink?

Answer 3

I don't know. It wasn't given.

Answer 4

it is given in fl oz, but what is it in mL?

Answer 5

177.47 mL

Answer 6

Sorry if I seem rushy. It's a timed thing

Answer 7

177.74 mL

Answer 8

how many mole is 47.0 mL of vodka (9.81 M)

Answer 9

47.0 right?

Answer 10

47 moles?

Answer 11

way too much

Answer 12

Isn't the 1 mol = 1 mL thing? Or am I thinking wrong?

Answer 13

concentration \(c\), is the number of moles \(n\), per volume

\[c\,[\text M] = \frac{n[\text{mol}]}{V[\text L]}\]

Answer 14

if the concentration is 9.81 M

it means there is 9.81 moles per litre

Answer 15

Oh the molarity

Answer 16

the volume of (9.81M) vodka is 47mL

the number of moles is n = 9.81 [mol/L] * 0.047 [L] =

Answer 17

.46107

Answer 18

yes, 0.461 [mol]

Answer 19

now the volume becomes 177.74 mL,

but the number of moles vodka stays the same

Answer 20

c = n/v
= 0.461 [mol] / 177.74 mL
= . . . [mol/mL]
= .... [mol/L]
= .... [M]

Answer 21

.00259

Answer 22

always have units

Answer 23

.00259 M

Answer 24

wrong units

Answer 25

0.00260 is [mol/mL]

but you want [mol/L] = [M]

Answer 26

Okay

Answer 27

How would I convert it to L?

Answer 28

1[L] = 1000 [mL]
1 = 1000 [mL/L]


0.00260 [mol/mL] * 1000 [mL/L]
=

Answer 29

2.6 M

Answer 30

right

Answer 31

And that's all there is to it?

Answer 32

the easier way is
9.81 * 47/177

Answer 33

That is easier

Answer 34

Thanks

Answer 35

c_1 = n/V_1

c_2 = n/V_2

c_2 = c_1 * V_1/V_2

Answer 36

So it' m1 v1 = m2 v2

Answer 37

That sort of thing?

Answer 38

that is conservation of momentum,

this is conservation of ethanol

Answer 39

Okay.