An unknown solution has an H+ concentration of 10-12 moles per liter. Which of the following statements correctly describes this
2 answers:
Answer:
The pH of the solution 12 which means that solution is basic in nature.
Explanation:
The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Mathematically written as:
Given concentration of hydrogen ions=
- Solution with pH less than 7 are considered as acidic as solutions.
- Solution with pH more than 7 are considered as basic as solutions.
The pH of the solution 12 which means that solution is basic in nature.
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Answer:
There are 0.93 g of glucose in 100 mL of the final solution
Explanation:
In the first solution, the concentration of glucose (in g/L) is:
15.5 g / 0.100 L = 155 g/L
Then a 30.0 mL sample of this solution was taken and diluted to 0.500 L.
- 30.0 mL equals 0.030 L (Because 30.0 mL ÷ 1000 = 0.030 L)
The concentration of the second solution is:
So in 1 L of the second solution there are 9.3 g of glucose, in 100 mL (or 0.1 L) there would be:
1 L --------- 9.3 g
0.1 L--------- Xg
Xg = 9.3 g * 0.1 L / 1 L = 0.93 g