posted by .

how would you make a 4% percent paraformaldehyde solution?

Work:
starting from 20% (diluted with PBS)
V1C1=V2C2
(100)(20)=(x)(4)
x=500
496 ml of PBS (accounting for 4% paraformaldehyde) or would you add 500ml of PBS

Thank you

It depends on whether the percent is w/v or v/v.

if it is v/v, as I suspect, you are diluting the original by a factor of five, so add 4 parts water.

if you want 500 ml, add 100ml of 20 percent, and add 400ml water.

if you want 45ml, add 1 part of PBS (9ml) and four parts (36ml) water.

## Similar Questions

1. ### chem

how much water would you need to add to 20.0 mL of 2.0 M NaCl to make a 0.10 M solution?
2. ### chemistry

Too make a 4% solution of paraformaldehyde from a 20 % solution. C1V1=C2V2 (20)(10ml)= (4)(x) x= 50ml so I would need to add 45ml of PBS and 4ml of the paraformaldhyde. Is that right.
3. ### chemistry

how would you make a 4% percent paraformaldehyde solution?
4. ### chem

how would you make a 4% percent paraformaldehyde solution?
5. ### statistics- normal standard distribution

a set of data is normally distributed with a mean of 500 and standard deviation of 100: *what would t he standard score for a score of 700 be?
6. ### chemistry

the molar solubility of PbS, in a 0.150 M ammonium sulfide (NH4)2S solution is?
7. ### Chem

How would we make 500mL of a 1.5 percent w/v solution of KC1 in water?
8. ### Chem

How would we make 500mL of a 1.5 percent w/v solution of KC1 in water?
9. ### Chemistry

How to Prepare 500mL a 50 mM pH 6 Citrate buffer starting from citric acid as the sole source of conjugate base I used the HH equation and got that citric acid concentration would be 0.035M, when converted to moles would be 3.362g. …
10. ### BioChem

Calculate the final concentration of ONPG (in μM) if you add 6.16 mL of 3.3 μM ONPG and dilute to a final volume of 10 mL with PBS buffer. I thought you would use M1V1 = M2V2 however it came up wrong I know we are adding 3.84 mL …

More Similar Questions