You require a solution containing 88 %v/v ethanol? You have 1540 mL of a 70 % v/v solution of ethanol. How many L of a 96 %v/v ethanol solution do you need to add to it to make the required 88 %v/v ethanol solution?
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You require a solution containing 88 %v/v ethanol? You have 1540 mL of a 70 %...
You require a solution containing 85 %v/v ethanol? You have 1350 mL of a 96 % v/v solution of ethanol. How many L of a 70 %v/v ethanol solution do you need to add to it to make the required 85 %v/v ethanol solution (2 decimal places)
You require a solution containing 127 mM of sodium hydroxide. You have 37 g of sodium hydroxide, how many mL of water do you need to add (whole number answer)?
a) Brandy is 40. % (v/v) ethanol solution. How many millilitres of ethanol are present in 0.750 L of brandy? ( /3) b) How many litres of a 5.0% (m/v) glucose solution would you need to obtain 75 g of glucose? ( /3) c) Calculate the mass percent (m/m) of a solution containing 26 g of potassium carbonate and 724 mL of water? ( /3)
From a 95% ethanol (ETOH) stock solution, you need to make 250 mL of 70% ETOH. How much stock and how much RO water do you need to make this solution- Show your work.
How many mL of a 10.0 %v/v ethanol solution are needed to have 20.0 mL of pure ethanol?
How do you prepare 500 ml of 30% v/v ethanol? How do you prepare 225 ml of 25% w/v NaCl? You have a 20 ml of a 10% w/v solution of ammonium sulfate. How many grams of ammonium sulfate are in this solution? You want to run a cesium chloride gradient to purify a sample of DNA in an ultracentrifuge. You wish to fill a 15 ml test tube with five equal layers of 5%, 10%, 15%, 20%, and 25%...
You need to make 150mls of a 70% ethanol solution of EtOH from a 95% solution. How would you do this?
Making Solutions Practice Problems: I. How would you prepare 100 ml of a 30% (w/v) solution of polyethylene glycol (PEG)? 2. How would you prepare 50 ml of a 9 % (w /v ) solution of NaCI? 3. How would you prepare 200 ml of 70 % ( v /v ) solution of ethanol from a stock of 95% ethanol? How would you prepare 200 ml of 0.3 M NaCl? (NaCl MW 58.44) 4. 5. How are 50 ml of...
Part A You need 550 mL of a 6.7 % (m/v) glucose solution. If you have a 23 % (m/v) glucose solution on hand, how many milliliters of this solution do you need? Express your answer to two significant figures and include the appropriate units. TT HÀ • • Ea ? Value Units Submit Request Answer
Part A You need 300. mL of a 10. % (m/v) glucose solution. If you have a 25% (m/v) glucose solution on hand, how many milliliters do you need? Express your answer to two significant figures and include the appropriate units. V: Value Units Submit Request Answer