What is the charge for MnO4

Aluminum hydroxide is insoluble in pure water but dissolves in a solution of sodium hydroxide because: Select the correct answer

kkurt [141]

Answer:

aluminum forms a complex ion with excess hydroxide

Explanation:

Complex formation accounts for the dissolution of certain compounds. For instance,reaction of aluminum and sodium hydroxide yields insoluble aluminum hydroxide as follows;

Al(s) + 3NaOH(aq) -----> Al(OH)3(s) +Na(s)

However, in excess NaOH, the solid aluminum hydroxide dissolves as due to the formation of a complex Al(OH)4^- in the solution.

5 0

3 years ago

Consider a different analyte for this exercise. Citric acid is found in many fruits and fruit juices. Sodium hydroxide (NaOH) is

Tpy6a [65]

Answer:

(a) 1:3

(b)

mmol of OH⁻ = 1.893 mmol

mmol of H₃C₆H₅O₇: 0.6310 mmol

mass of H₃C₆H₅O₇: 0.1212 g

mass % of H₃C₆H₅O₇ in orange juice: 1.37%

molarity of H₃C₆H₅O₇ in orange juice: 0.0726 M

Explanation:

Let's consider the following balanced chemical equation.

H₃C₆H₅O₇ + 3 OH⁻ → C₆H₅O₇³⁻ + 3 H₂O

(a) What is the stoichiometry of H₃C₆H₅O₇ to OH⁻?

The molar ratio of H₃C₆H₅O₇ to OH⁻ is 1:3

(b)

mmol of OH⁻: ?

$24.61mL.\frac{0.0769mol}{L} =1.893mmol$

mmol of H₃C₆H₅O₇: ?

$1.893mmolOH^{-} .\frac{1molH_{3}C_{6}H_{5}O_{7}}{3molOH^{-} } =0.6310mmolH_{3}C_{6}H_{5}O_{7}$

mass of H₃C₆H₅O₇: ?

The molar mass of the citric acid is 192.1 g/mol.

$0.6310 \times 10^{-3} molH_{3}C_{6}H_{5}O_{7}.\frac{192.1gH_{3}C_{6}H_{5}O_{7}}{1molH_{3}C_{6}H_{5}O_{7}} =0.1212gH_{3}C_{6}H_{5}O_{7}$

mass % of H₃C₆H₅O₇ in orange juice: ?

$\frac{0.1212g}{8.83g} \times 100\%=1.37\%$

molarity of H₃C₆H₅O₇ in orange juice: ?

$M=\frac{0.6310 \times 10^{-3} molH_{3}C_{6}H_{5}O_{7}}{8.69 \times 10^{-3} L} =0.0726M$

7 0

3 years ago

You are trying to make a sugar water solution by dissolving solid sugar into liquid water. You would like to increase (speed up)

timofeeve [1]

Answer:

mmmmmmmmmmmm

Explanation:

mmmmmmmmm

3 0

2 years ago

50 Points!! 25 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!

Tema [17]

Answer:

Match the words to the definitions.

Explanation:

1. F

2. A

3. C

4. E

5. B

6. D

7. B

8. F

9. A

10. E

11. D

12. C

13. B

4 0

3 years ago

The trait for flower color in a plant has red and white alleles. The red color is the dominant trait. What is the phenotypic rat

Fudgin [204]

Answer :

2 red : 2 white

Explanation:

;)long story short

hetro with hetro gives 3:1
hetro with recessive gives 1:1

Hetro :- ( Rr) one capital letter and one small
Recessive :- (rr) two small leters

6 0

3 years ago