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3 years ago

A(n) _____ is a compound that produces hydrogen ions when dissolved in water.

2 answers:

6 0

<span>An acid is a compound that produces hydrogen ions when dissolved in water. The pH of acid is less than 7 because it is rich in H+ concentration. Basic solutions have pH greater than 7 because it is rich in OH-. Neutral solutions meanwhile have pH equal to 7.</span>

yan [13]3 years ago

4 0

Answer: a. acid

Explanation:

a. Acids are those substances which either donates hydrogen ions $(H^+)$ when dissolved in water or accepts a pair of electrons.

$HCl\rightarrow H^++Cl^-$

b. Buffer is a solution which resist changes in pH on addition of small amounts of acid or base into it.

c. Bases are those substances which either donates hydroxide ions $(OH^-)$ when dissolved in water or donates a pair of electrons.

$NaOH\rightarrow Na^++OH^-$

d. Indicators are chemical compounds which show a change or appearance in color at particular pH. Example: litmus

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For the reaction 2NH3(g) + 2O2(g)N2O(g) + 3H2O(l) H° = -683.1 kJ and S° = -365.6 J/K The standard free energy change for the rea

BlackZzzverrR [31]

Answer:

$\Delta G^{0}$ = -457.9 kJ and reaction is product favored.

Explanation:

The given reaction is associated with 2 moles of $NH_{3}$

Standard free energy change of the reaction ( $\Delta G^{0}$ ) is given as:

$\Delta G^{0}=\Delta H^{0}-T\Delta S^{0}$ , where T represents temperature in kelvin scale

So, $\Delta G^{0}=(-683.1\times 10^{3})J-(273K\times -365.6J/K)=-583291.2J$

So, for the reaction of 1.57 moles of $NH_{3}$ , $\Delta G^{0}=(\frac{1.57}{2})\times -583291.2J=-457883.592J=-457.9kJ$

As, $\Delta G^{0}$ is negative therefore reaction is product favored under standard condition.

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2 years ago

Which term is de ned as the region in an atom where an electron is most likely to be located?

charle [14.2K]

Orbital
All atoms have the same number of electrons as protons. Negative electrons are attracted to the positive nucleus. This force of attraction keeps electrons constantly moving around the nucleus. The region where an electron is most likely to be found is called an orbital.
Here you go :)

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2 years ago