Given parameters:
Mass of sucrose = 5g
Density of sucrose = 1.12g/mL
Percentage of sucrose per liter of cane juice = 12%
Unknown:
Volume of cane juice required =?
We need to understand the relationship between volume and density. Density represents mass per unit volume.
Mathematically;
Density =
Now, calculate the volume of sucrose;
1.12g/mL =
Volume = = 4.46mL = 4.46 x 10⁻³L since 1000mL = 1L
Since 12% of one liter of cane juice is sucrose,
12% of x liter of cane juice = 4.46 x 10⁻³L
Volume of cane juice = 4.46 x 10⁻³ x = 0.037L
Volume of cane juice needed is 0.037L
Answer:
3.816 × 10⁻³ M
Explanation:
A stock solution of Cu²⁺(aq) is made by dissolving 0.8875 g of solid Cu(NO₃)₂∙2.5H₂O in a 100.0-mL volumetric flask, and then brought up to volume with water. What is the molarity (in M) of Cu²⁺(aq) in this stock solution?
We can derive the following relations:
The moles of Cu²⁺ present in 0.8875 g of Cu(NO₃)₂∙2.5H₂O are:
The molarity of Cu²⁺ is: