BACE Solutions Practice Verification

#1 What mass of glucose would you need to make 800 ml of a 20% (wt/vol) glucose solution? (Round to nearest whole number. Enter just the answer, no units needed. MW glucose is 180 Da.)

Mathematical Equivalence

ON

#2 Calculate the molarity of the glucose solution you made in question 1.  Round to the nearest tenth. Enter the number only, no units are needed.

Mathematical Equivalence

ON

3. #3 How would you make 3 liters of a 1.5 M Tris buffer. (MW of Tris is 121.1 Da. Round to the nearest whole number, no units needed. )

Mathematical Equivalence

ON

#4 Explain how you would prepare 750mL of a 30% (vol/vol) aqueous solution of a strong acid. Enter the volume of acid you would need, in mL. Just enter the number, rounded to the nearest whole number.

Mathematical Equivalence

ON

For question #4, how many mL of water would you need?

Mathematical Equivalence

OFF

Tags

NGSS.HS-ESS2-5

#5 Calculate the mass of SDS you would need to make 1.2Lof a 10% (wt/vol) SDS solution. (Round to the nearest whole number. Enter the number only, no units.)

Mathematical Equivalence

ON

Tags

NGSS.HS-PS1-7

#6 You have excess stock solutions of 4M NaCl and 3M sodium citrate. Explain how you would prepare 1 liter of a working solution that is 2M NaCl and 0.3 M sodium citrate.  (Enter the mL of NaCl stock sol'n you would need, rounded oto the nearest whole number.)

Mathematical Equivalence

ON

#6 You have excess stock solutions of 4M NaCl and 3M sodium citrate. Explain how you would prepare 1 liter of a working solution that is 2M NaCl and 0.3 M sodium citrate.  (Enter the mL of sodium citrate stock sol'n you would need, rounded to the nearest whole number.)

Mathematical Equivalence

OFF

#6 About how much water, in mL, will you need to make this working solution?

Mathematical Equivalence

OFF