Question #95635

How many grams of NaHCO3 (sodium bicarbonate, or baking soda) would you need to make a 2 molar (2M) solution?

How many grams of C12H22O11 (sucrose) would you need to make a 0.5 molar (1M) solution?

How many grams of C12H22O11 (sucrose) would you need to make a 0.5 molar (1M) solution?

Expert's answer

(i)

Let's say the solution volume is 1 L. Then:

"n(NaHCO_3) = c*V"

"m(NaHCO_3) = n*M"

"m(NaHCO_3) = 2mol*84g\/mol = 168 g."

(ii)

Let's say the solution volume is 1 L. Then:

"n(C_{12}H_{22}O_{11}) = c * V"If solution 0.5 molar, then "n(C_{12}H_{22}O_{11}) = 0.5 mol".

Then "m(C_{12}H_{22}O_{11}) = n*M = 0.5mol*342g\/mol = 171 g".

If solution is 1M, then "n(C_{12}H_{22}O_{11}) = 1 mol".

Then "m(C_{12}H_{22}O_{11}) = 342g."

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