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1. ### how would you prepare 100 mLs of 2M hydrochloric acid?

36.5% by weight means there are 36.5 g HCl for every 100 g of solution. 36.5 g is 1 mole, while 100 g /1.200 g/ml = 83.33 mL 1 mole / 0.08333 L = 12 M concentrated solution To make 100 mL of 2 M HCl, use this equation...

1 Answers · Science & Mathematics · 13/08/2010

2. ### 50 mLs HNO3 of pH 2 is added to 450mLs of water. What is the new pH?

pH = -log(concentration of H+) for pH to be 2, the concentration of H+ ions must be 0.01mol/L so the moles of HNO3 is n = cV n = 0.01 x 0.05 n = 0.0005 mol if you add water, the volume increases, the moles stays the...

2 Answers · Science & Mathematics · 06/11/2010

3. ### How many mLs of 28% by weight of NH2(17.0g/mol) with a density of 0.890 g/ml are needed to prepare 500mL?

mass of NH3 required: (0.250 mol/L) (0.5 L) = x / 17.0 g/mol x = 2.125 g mass of 28% NH3 that contains 2.125 g: 2.125 is to y as 28 is to 100 y = 7.589286 g volume of 7.589286 g of 28% solution: 7.589286 g divided by 0.890 g/mL = 8.53 g...

2 Answers · Science & Mathematics · 20/11/2013

4. ### What volume (mLs) of a 0.29 M solution of sodium bromide would contain 3.8 g of sodium bromide?

NaBr = 102.9 g/mol 3.8 g / 102.9g/mol = 0.0369 mol NaBr 0.29 = 0.0369 / L 0.29(L) = 0.0369 L = 0.127 L 0.127 x 1000 = 127 mL

2 Answers · Science & Mathematics · 28/05/2009

5. ### How many mLs of 0.0005 M H3PO4 are needed to neutralize 75 mL of 0.006 M Ba(OH)2?

Balanced equation : 3Ba(OH)2 + 2H3PO4 → Ba3(PO4)2 + 6H2O 3mol Ba(OH)2 reacts with 2 mol H3PO4 Mol Ba(OH)2 in 75mL of 0.006M solution = 75/1000*0.006 = 4.5*10^-4mol...

2 Answers · Science & Mathematics · 07/05/2015

6. ### How many mLs of 0.480M sulphuric acid is required to neutralise 26.0mLs of 0.612M sodium hydroxide?

M1 * V1 = M2 * V2

3 Answers · Science & Mathematics · 19/02/2010

7. ### How many mLs of 1.50 M KOH are required to neutrilize 15.0 mL of 6.0 M HNO3 PLEASE HELP!?

60.0 ml You want the quantity of OH- to equal the quantity of H+. Thus: x ml * 1.50 M = 15.0 ml * 6.0 M

2 Answers · Science & Mathematics · 11/04/2007

8. ### What volume of 0.100 M sodium hydroxide solution (mLs) must be added to 20.0 mL of 0.104 M hydrochloric...?

form a balanced equation of the reaction. NaOH + HCl --------> NaCl + H2O 20 mL HCl = 0.02 dm^3 HCl (or) 0.02 L HCl in 0.02 dm^3 HCl, no of moles of HCl = molarity x volume = 0.104 x 0.02 = 2.08 x 10^-3 mol...

3 Answers · Science & Mathematics · 16/05/2010

9. ### What is 100 ppm of 100 mLs of fluid?

There are two possible answers depending on the solute and solvent and if the ppm represents by volume or by weight By weight 100 ppm =(approx) 100 mg/L 100 mg/L (0.1L) = 10 mg of solute By volume 100 ppm = 100 uL/L...

1 Answers · Science & Mathematics · 21/03/2010

10. ### ? mLs of concentrat nitric acid will be needed to supply 4.20 mol of HNO3? concen nitric acid is 72.0% hno3?

The 72.0% HNO3 is a mass/mass %. We must convert it to mass/volume using the density (= specific gravity) and then molarity. (72.0 g HNO3 / 100 g solution) x (1.42 g solution / mL) = 1.02 g HNO3 / mL (1.02 g HNO3 / mL) x (1000 mL...

4 Answers · Science & Mathematics · 15/04/2011