The color changes to a blue green color because of the acidity/pH in water. Example is the statue of liberty
Answer:
0.21 M. (2 sig. fig.)
Explanation:
The molarity of a solution is the number of moles of the solute in each liter of the solution. The unit for molarity is M. One M equals to one mole per liter.
How many moles of NaOH in the original solution?
,
where
- is the number of moles of the solute in the solution.
- is the concentration of the solution. for the initial solution.
- is the volume of the solution. For the initial solution, for the initial solution.
.
What's the concentration of the diluted solution?
.
- is the number of solute in the solution. Diluting the solution does not influence the value of . for the diluted solution.
- Volume of the diluted solution: .
Concentration of the diluted solution:
.
The least significant number in the question comes with 2 sig. fig. Keep more sig. fig. than that in calculations but round the final result to 2 sig. fig. Hence the result: 0.021 M.
Answer:
The volume of the concentrated nitric acid taken: <u>V₁ = 4.3 mL</u>
Explanation:
Given: Final pH of nitric acid (HNO₃) solution= 1.30
Volume of HNO₃ solution: V₂ = 600.0 mL
Concentration of stock HNO₃ solution: M₁ = 7.0 M
Volume of the stock HNO₃ solution: V₁ = ?
To find out <u>the concentration of HNO₃ solution (M₂),</u> we use the following equation: pH = - ㏒ [H⁺]
⇒ 1.3 = - ㏒ [H⁺]
⇒ ㏒ [H⁺] = - 1.3
⇒ [H⁺] = antilog (- 1.3)
⇒ [H⁺] = antilog (- 1.3) = 0.050 M = M₂
Now, to calculate<u> the volume of concentrated 7.0 M HNO₃ (V₁)</u> that should be added to prepare 600.0 mL of 0.050 M HNO₃ solution, we use the dilution equation: M₁ × V₁ = M₂ × V₂
⇒ V₁ = M₂ × V₂ ÷ M₁
⇒ V₁ = (0.050 M) × (600.0 mL) ÷ (7.0 M)
⇒ <u>V₁ = 4.3 mL (rounded to two significant digits)</u>
<u>Therefore, the volume of the concentrated nitric acid taken: V₁ = 4.3 mL</u>
The phenotype for the genotype bb would be Purple and white
Answer:
A conical measure is a type of laboratory glassware which consists of a conical cup with a notch on the top to allow for the easy pouring of liquids, and graduated markings on the side to allow easy and accurate measurement of volumes of liquid