# english

posted by .

calculate the mass and prepare 200ml 0.1M, 250 ml 0.2 N, 100 ml 3% of NaCl, Na2Co3 solution

• NOT english -

.

• Chemistry -

You will have to find the molar mass here..

200 ml * 0.1 mol/ L * 1 L/ 1000 mL= 0.02M

250 ml* 0.2M/ L * 1L/ 1000 mL= 0.05M N

I somehow feel this problem is incomplete or either I am unable to understand the chemical compound name. Is there anymore to it?

• english -

You have six problems here. Three are for NaCl and three for Na2CO3.

For NaCl:
200 mL of 0.1M:
How many mols do you want? That's M x L = 0.1M x 0.200L = 0.02 mols.
How many grams is that.
mols = grams/molar mass. You know molar mass and mols; solve for grams.

250 mL of 0.2 N. How many equivalents do you want? That's N x L = 0.05 equiv.
How many grams is that?
#equivalents = grams/equilvalent weight. You know # equivalents and equivalent weight; solve or grams.

100 mL 3% NaCl (I assume that is % w/w.)
3g NaCl/100 g solution.

The Na2CO3 is done the same way.

## Similar Questions

1. ### science-chem

first, thanks so much Bob for helping me!!!! Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M …
2. ### science

Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M NaCl/L)*(58.5g NaCl/1mole NaCl)=0.278 g NaCl....is …
3. ### Chemistry

25.0 mL of a NaCl solution (concentration unknown) was found to react with 20 drops of the chloride test solution from the PU Chloride Test Kit. Calculate the mass of NaCl (in grams) in this solution. Calculate the mass of NaCl required …
4. ### Chem

Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. …
5. ### chemistry

. Given the following stocks 4M NaCl, 3M NaOH, 5M HCl (a) Prepare 200ml of a solution containing 0.5M NaCl and 0.1M (b) Prepare 300ml of a solution containing 0.5M NaCl (c) Prepare 200ml of a solution containing 0.5M NaCl and 0.1M …
6. ### chemisrty

Q4) Suppose you prepare 950 mL of a solution by dissolving 100 grams of NaCl in 900 mL of water. Assuming the density of pure water to be 1 g/mL, answer the following questions with regards to this solution: a) What is the mass percent …
7. ### Chemistry

You are instructed to prepare 250 mL of a solution which is 50 M in NaCl and 0.10 M in acetic acid. Solid NaCl and a 3.0 M solution are avaliable. How would you prepare this solution?
8. ### Chem

1) Which solution will have the lowest OH- A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 2) Which solution will be the strongest base?
9. ### Chemistry

A student intend to prepare 200ml of 0.3M NaCl solution . The mass in gram of NaCl needed to prepare solution is ?
10. ### Chemistry

To a mixture of NaCl and Na2CO3 with a mass of 1.300 g was added 55.00 mL of 0.243 M HCl (an excess of HCl). The mixture was warmed to expel all of the CO2 and then the unreacted HCl was titrated with 0.100 M NaOH. The titration required …

More Similar Questions