3 years ago

Keep an emergency kit and fresh water in your car in the event of _____.

Chemistry

1 answer:

Kay [80]3 years ago

7 0

Answer:

pH= 12.7

Explanation:

a)Keep an emergency kit and fresh water in your car in the event of _an unexpected event.

b) pOH= -log[OH-]

pOH= -log[5.00×10^-2]

pOH= 1.3

But pH+pOH= 14

pH= 14-pOH= 14-1.3

pH= 12.7

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Consider the addition of NaCl to the ice-water mix in Part II. Which of the following statements is TRUE?

Sati [7]

B is correct

salt lowers the freezing point of water (colligative property) by lowering the interaction and intermolecular forces between water molecules

6 0

3 years ago

Hemoglobin in your blood does not use elemental iron. It uses iron in the form of Fe2+(aq).

valina [46]

Explanation:

Balanced chemical reaction equation will be as follows.

$2Fe^{2+}(aq) + 2H^{+}(aq) \rightleftharpoons 2Fe^{3+}(aq) + H_{2}(g)$

In human body, the neutral iron changes into $Fe^{2+}$ (aq) cation. There will be an oxidation-half reaction and a reduction-half reaction. Equations for this reaction are as follows.

Oxidation: 2Fe^{2+}(aq) \rightleftharpoons 2Fe^{3+}(aq) + 2e^{-}[/tex] .... (1)

Reduction: $2H^{+}(aq) + 2e^{-} \rightleftharpoons H_{2}(g)$ ...... (2)

On adding both equation (1) and (2), the overall reaction equation will be as follows.

$2Fe^{2+}(aq) + 2H^{+}(aq) \rightleftharpoons 2Fe^{3+}(aq) + H_{2}(g)$

Therefore, neutral iron is a part of Heme - b group of Hemoglobin and in an aqueous solution it dissolutes as a part of Heme group. Hence, then it becomes an $Fe^{2+}$ cation.