What is the final dilution factor (DF) when 10 mL sample is added to 50 mL diluent? Due to social distancing, you are only allowed, 1 student per 20 square feet of room. How many students can you have in a 400 square foot room? You are asked to prepare 40 mL of a 1:20 dilution from a stock solution. How many milliliters (mL) of stock solution do you aliquot? You are asked to make a 2 Liter of a 50 mM solution of CaCl2. The molecular weight of CaCl2 is 110.98 g/mol. How many grams of CaCl2 do you need
Added by Robert M.
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Step 2: The number of students allowed in a 400 square foot room is 20. Step 3: To prepare 40 mL of a 1:20 dilution from a stock solution, you need to aliquot 2 mL of stock solution. Step 4: To make a 2 Liter of a 50 mM solution of CaCl2, you need 110.98 g of Show more…
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Dominique Jan T.
A stock solution of CaCl2 (molar mass 111 g/mol) is made by adding 151 g CaCl2 to enough water to make 200 ml of solution. A 10 ml portion of the stock solution is diluted to a final volume of 250 ml. What is the concentration of the chloride ions in the final solution?
Ivan K.
Determine the final volume, in milliliters, of each of the following: a. a $1.00 \%(\mathrm{m} / \mathrm{v}) \mathrm{H}_{2} \mathrm{SO}_{4}$ solution prepared from $10.0 \mathrm{mL}$ of a $20.0 \% \mathrm{H}_{2} \mathrm{SO}_{4}$ solution b. a $0.10 \mathrm{M} \mathrm{HCl}$ solution prepared from $25 \mathrm{mL}$ of a $6.0 \mathrm{M} \mathrm{HCl}$ solution c. a $1.0 \mathrm{M} \mathrm{NaOH}$ solution prepared from $50.0 \mathrm{mL}$ of a $12 \mathrm{M}$ NaOH solution d. a $1.0 \%(\mathrm{m} / \mathrm{v}) \mathrm{CaCl}_{2}$ solution prepared from $18 \mathrm{mL}$ of a $4.0 \%(\mathrm{m} / \mathrm{v}) \mathrm{CaCl}_{2}$ solution
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