Question

You are directed to prepare 100 mL of a 500 mEq/L KOH standard. The primary standard...

You are directed to prepare 100 mL of a 500 mEq/L KOH standard. The primary standard used has a concentration of 0.400 Eq/L. When titrating your KOH
solution, you discover that 4.0 mL of the primary standard reacted exactly with 5.0 mL of the KOH solution.
a. What is the actual Eq/L concentration of the KOH solution?
b. How many mEq are required to adjust the volume and concentration of the remaining 85 mL of KOH solution to 100 mL of a 500 mEq/L KOH solution?
c. How many mL of 12 Eq/L KOH stock must be added in order to adjust the concentration of the KOH standard to 500 mEq/L?

0 0
Add a comment Improve this question Transcribed image text
Know the answer?
Add Answer to:
You are directed to prepare 100 mL of a 500 mEq/L KOH standard. The primary standard...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • A physician orders KCI 40 mEq to be added to D5W 1000 mL and administered over...

    A physician orders KCI 40 mEq to be added to D5W 1000 mL and administered over 4 hr. The injection solution on hand is KCl 2 mEq/mL. How many milliliters of KCl should be added? a. 40 mL b. 8 mL c. 16 mL d. 20 mL ·You have been asked to prepare 1 L of a 2% (w/v) solution. You have a 100% solution in stock. How much diluent will be needed? a. 2.0 ml b. 20 mL c....

  • How many grams of KOH must be added to 500 mL of a 0.100 M solution...

    How many grams of KOH must be added to 500 mL of a 0.100 M solution of Phosphoric acid to produce a buffer pH 12.50? pKa for phosphoric acid = 12.66

  • A technologist is ask to prepare 100 mL of a 5% (v/v) concentration of sodium hypochloride....

    A technologist is ask to prepare 100 mL of a 5% (v/v) concentration of sodium hypochloride. How much solute should they add to the concentrated sodium hypochloride? A CLS needs to make a 1 to 10 dilution with a total volume of 100.0 mu L. How many mu L of patient serum must be used to make this dilution? Consider if you wanted to make 1.00 L of a 0.200 M solution of Na3PO4 (163.94 g). How many grams of....

  • To dilute a bacterial culture, 100 mu l of a 16 hour culture is mixed with...

    To dilute a bacterial culture, 100 mu l of a 16 hour culture is mixed with fresh culture media to a final volume of 5 ml. The 16 hour culture was diluted by a factor of: _____ An antibiotic (ampicillin) used during a Transformation experiment. Ampicillin is stored as a stock solution of 100 mg/ml. You are pouring plates from a 500 ml flask of Lauria Bertini agar (LB Agar) and you need an antibiotic concentration of 100 mu g/ml...

  • ian orders KCI 40 mEq to be added to 6 , A physician orders K 56....

    ian orders KCI 40 mEq to be added to 6 , A physician orders K 56. EW 1000 mL and administered over 4 hr. The iniection solution on hand is KCI 2 mEq/mL w many milliliters of KCl should be added? a. 40 mL b. 8 mL c. 16 mL d. 20 mL 57 You have been asked to prepare 1 L of a 2% (w/v) solution. You have a 100% solution in stock. How much diluent will be needed?...

  • A 4.0 mg/dl standard solution is needed. To prepare 100 ml of the working standard, how...

    A 4.0 mg/dl standard solution is needed. To prepare 100 ml of the working standard, how much stock standard of a 1-mg/ml solution is needed? I need this one using the specific information so I understand the V1C1 = V2C2 Please explain in detail how to answer the Question. Thank you

  • please show work 17) When 200, mL of water are added to 100. mL of 12 % KCl solution the final concentration of KCI...

    please show work 17) When 200, mL of water are added to 100. mL of 12 % KCl solution the final concentration of KCI is (Assume the volumes add.) A) 12% B) 4.0% C) 36%. D) 6.0% E) 8.0% 18) What is the molarity of a solution containing 5.0 moles of KCI in 2.0 L of solution? A) 2.5 M B) 1.0 M C) 5.0 M C) 10. M E) 2.0 M 19) What is the molarity of a solution...

  • You are asked to prepare 500. mL 0.150 M acetate buffer at pH 5.10 using only...

    You are asked to prepare 500. mL 0.150 M acetate buffer at pH 5.10 using only pure acetic acid (MW = 60.05 g/mol, pka = 4.76), 3.00 M NaOH, and water. How many grams of acetic acid will be needed to prepare the 500. mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution. mass: DD What volume of 3.00 M NaOH, must be added to the acetic acid to achieve...

  • You are asked to prepare 500. mL 0.300 M acetate buffer at pH 5.10 using only...

    You are asked to prepare 500. mL 0.300 M acetate buffer at pH 5.10 using only pure acetic acid (MW = 60.05 g/mol, pKa = 4.76), 3.00 M NaOH, and water. How many grams of acetic acid will be needed to prepare the 500. mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution. mass: 60 What volume of 3.00 M NaOH, must be added to the acetic acid to achieve...

  • You are asked to prepare 500. mL 0.150 M acetate buffer at pH 5.00 using only...

    You are asked to prepare 500. mL 0.150 M acetate buffer at pH 5.00 using only pure acetic acid (MW = 60.05 g/mol, pKa = 4.76), 3.00 M NaOH, and water. How many grams of acetic acid will be needed to prepare the 500. mL buffer? Note that the given concentration of acetat refers to the concentration of all acetate species in solution. mass: What volume of 3.00 M NaOH, must be added to the acetic acid to achieve a...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT