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3 years ago

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

2 answers:

6 0

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.

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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Which element, mg or al, will have the higher first ionization energy and which will have the higher third ionization energy?

vesna_86 [32]

Al will have a higher first and third ionization energy

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3 years ago

One way in which elements differ from each other is the structure of the electron cloud in each elements Atoms in electron cloud

BartSMP [9]

Not sure what you are asking. I have two possible answers though...

It could either be more negatively charged, or valence electrons.

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Again, I don't know what you were asking, but one of these answers may be correct.

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3 years ago

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How many grams are in 9.05 x 1023 atoms of silicon

UkoKoshka [18]

Answer:

42.2075 grams

Explanation:

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3 years ago

If the ph of hc3h5o2 is 4.2 and the ka 1.34x10^-5, what is the equilibrium concentration

n200080 [17]

CH₃CH₂COOH + H₂O ↔ CH₃CH₂COO⁻ + H₃O⁺

pH = 0.5 pKa + 0.5 pCa
0.5 pCa = pH - 0.5 pKa
= 4.2 - (0.5 * (-log 1.34 x 10⁻⁵)) = 1.76
pCa = 3.53
Ca = antilog - 3.52 = 3 x 10⁻⁴
where Ca is the acid concentration

5 0

3 years ago

A gas sample occupies a volume of 1 L at 200K. The temperature at which the gas would double its volume is

kicyunya [14]

Answer:

400 K

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

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3 years ago