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1. How do you find concentration of HCl when given both mLs and concentration of NaOH? Please help I have been trying for hours!?

You have : ------------------ ( M HCl ) ( V HCl ) = ( M NaOH ) ( V NaOH ) M HCl = ( M NaOH ) ( V NaOH / V HCl ) M HCl = ( 0.02387M ) ( 42.10...

1 Answers · Science & Mathematics · 08/10/2015

2. How many mLs of a 5.89 M AgNO3 solution is needed to completely react with 25.0 mLs of a 3.67 M MgCl2 solution?

moles of MgCl2 ---> (3.67 mol/L) (0.0250 L) = 0.09175 mol For the equation, we will consume 2 moles of AgNO3 for every mole of MgCl2 consumed. Therefore: 0.09175 mol times 2 = 0.1835 moles of AgNO3...

2 Answers · Science & Mathematics · 05/05/2013

3. How many grams of glucose do you need to add to 100 mLs of water to make a 1.0 mM solution of glucose?

You want 0.001 mol in 1 liter. because that is what means 1.0mM solution. So as 180g is 1 mole you need 180/1000 = 0.180g (180mg) for a liter. So devide that by 10 to get how much you need for 100ml. That is 18mg or 0.0180g. Hope that helps.

1 Answers · Science & Mathematics · 27/01/2010

4. Calculate the change in pH of the buffer when 10 mLs of 0.5 Molar Hydrochloric Acid is added to the buffer?

which buffer ?

1 Answers · Science & Mathematics · 05/03/2009

5. Plesae help me with this question The Ksp for Ag2CrO4 is 9.0 x 10-12. If 200 mLs of 0.0050 M AgNO3 is combined?

Qsp = [Ag+]²[CrO4+2] Qsp = [(0.0050 M)(200 ml) / (200 + 300 ml)]² [(0.0020 M)(300 ml) / (200 + 300 ml)] Qsp = 4.8e-9 Qsp > Ksp (precipitate forms)

1 Answers · Science & Mathematics · 05/03/2012

6. 16.93 g of LiI is dissolved in 100 mls of H2O and titrated with 1.63 M Ag2SO4 How many mLs of Ag2SO4 is needed?

Moles LiI = 16.93 g / 133.845 g/mol = 0.126 2 LiI + Ag2SO4 >> 2 AgI + Li2SO4 moles Ag2SO4 needed = 0.126 / 2 =0.0630 V = 0.0630 / 1.63 = 0.0387 L => 38.7 mL

1 Answers · Science & Mathematics · 05/10/2008

7. are milliliters the same thing as CCs? i am supposed to mix something and the eyedropper is measured in MLs...

For virtually all purposes yes. ml is the old way of measuring. This has been replaced by cc. They are almost identical.

5 Answers · Science & Mathematics · 29/09/2006

8. Water sample contains 20 ppm phosphorus, how many grams of phosphorus would 500 mLs contain?

20 ppm = 20 mg/L assuming it's on a mass basis and the solvent is water. 20 mg/L * 0.5 L = 10 mg

1 Answers · Science & Mathematics · 12/03/2015

9. 16.93 g LiI is dissolved in 100 mLs of water and is titrated with 1.63M Ag2SO4. how many mLs Ag2SO4 is needed?

The molar masses of LiI and Ag2SO4 are: 133.845 g/mol and 311.799 g/mol, respectively. Hence 16.93 g LiI is: (16.93 g)/(133.845 g/mol) = 0.12649 mol. Since 2 mole LiI will react with 1 mole of Ag2SO4: 2LiI...

1 Answers · Science & Mathematics · 06/12/2008

10. What is the pH of 25 g of HCN and 35 g of NaCN mixed to form a total volume of 500 mLs?

moles HCN = 25/27 g/mol=0.926 moles NaCN = 35/49 g/mol=0.714 [HCN]= 0.926/0.500 L=1.85 M [CN-]= 0.714/0.500=1.43 M pKa = 9.21 pH = 9.21 + log 1.43/1.85=9.10

1 Answers · Science & Mathematics · 25/07/2009