science(chem)

posted by .

How would I make a 5% solution of sodium bisulfite?

sodium bisulfite: NaHSO3
Molar mass: 104.06 g/mol

is it 5% w/w
or v/v
or w/v

b/c if it was w/w then it would be
weight percent w/w= weight solute/ weight solution* 100

I need help on this

Thanks

• science(chem) -

I have been told several times that it means w/w if w/w or w/v is not specified (you don't mean v/v because NaHSO3 is a solid). However, for your purposes, I doubt if it makes that much difference.

• science(chem) -

Is it 5g of the sodium bisulfite mixed with 100ml of solvent?

• science(chem) -

I mean 5g of sodium bisulfite mixed with 100g of solvent

• science(chem) -

No, w/w is 5 g NaHSO3 + 95 g solvent for 100 g solution.

• life science -

need help on cell cycle

• science(chem) -

but why does the Fundamentals of Analytical Chemistry book state on the w/w page that a "70% solution, which means the reagent contains 70g of HNO3 per 100g of solution" ?

• science(chem) -

I'm not looking at that page; however, look at it this way.
70% solution means that if we take 100 g of solution, 70% (or 70 g will be the solute and 30 g is the solvent to make 100 g of solution. And that is consistent with making a 70% solution of something, w/w.
To make a 70% w/w solution, we take 70 g solute, add 30 g solvent, to make 100 g solution. In your example and my example,we have 100 g of solution.

• science(chem) -

okay

Thanks Dr.Bob

Similar Questions

1. ap chem

a solution is prepared by dissolving 4.87 g of sodium dichromate in 25.0 ml of water. (d=1.00g/mL).calculate a. the mass percent of sodium dichromate in the solution. b. the mass percent o water in the solution. c the mole fraction …
2. science(chem) Dr.Bob-> need help on this long lab

For 1 part of the lab I: prepare 4-Bromo-2-chloro-6-iodoaniline I dissolve 250mg recrystallized 4- Bromo-2-chloro-6-iodoaniline in 4ml of glacial acetic acid in 25ml erlenmyer flask and add 1ml water to the mixture. Then I prepare …
3. Chemistry

What is the balanced ionic equation between bromine and sodium bisulfite?
4. organic chemistry

what is mechanism for triphenylmethanol with hydroiodic acid and sodium bisulfite.
5. organic chemistry

What is the product of reaction of triphenylmethanol heated up with 40% HI in glacial acetic acid and then treated with sodium bisulfite?
6. Organic chemistry

1. In in experiment, sodium bisulfite solution is added at the end in order to destroy the unreacted bromime. What reaction is occuring here?
7. Chem

How would I make a 0.25M solution of sodium bisulfite?
8. Chemistry 11

Find the percent composition of a compound containing sodium and chlorine if 24.34g of the compound contains 13.45g of sodium. My work: Molar mass of NaCl: MNa +MCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol Percent composition of Na: …
9. chemistry

Sodium carbonate (Na2CO3) has a molar weight of 105.9885 g/mol. A solution contains 50. mM sodium ions and 25 mM carbonate ions. What is the concentration of sodium carbonate in the solutions as expressed as mass/volume percentage?

More Similar Questions