Which of the following is a strong acid? A) HCIO2 B) HF C) HBO3 D) H2SO3 E) H2SO4
1 answer:
Answer:
Sulfuric acid
Explanation:
Acid strength (in water) is measured as the equilibria of dissociation of the acid into hydronium and its conjugated base. The greater the Ka value, greater the acid strength.
This equilibrium constant is denominated Ka where [H+] stands for the molar concentration of hydronium and [HA] stands for the molar concentration of the non-dissociated acid.
The Ka values for these acids are: for HClO2;
for HF;
for HBO3;
for H2SO3 and
for H2SO4
So, as the greatest Ka is from H2SO4 it is the strongest acid in this list.
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LiBr.
<h3>Explanation</h3>Note that the group number in this answer refers to the new IUPAC group number, which ranges from 1 to 18. Counts from the left. Start with the first two column (group 1 and 2), go on to the transition elements (Sc, Ti, etc. in group 3 through 12), and continue with the nonmetals (group 13 through 18).
Li is a group 1 metal. As a metal, it tends to form positive ions ("cations"). Metals in group 1 and 2 are <em>main group</em> metals. The charge on main group metal ions tends to be the same as the group number of the metal. Li is in group 1. The charge on an Li ion will be +1. Formula of the Li ion will be .
Br is a group 17 nonmetal. As a nonmetal, it tends to form negative ions ("anions"). The charge on nonmetal ions excepting for H tends to equal the group number of the nonmetal minus 18. Br is in group 17. The charge on a Br ion will be 17 - 18 = -1. Formula of the Br ion will be
All the ions in an ionic compound carry charge. However, some of the ions like are positive. Others ions like
are negative. Charge on the two types of ions balance each other. As a result, the compound is <em>overall</em> neutral.
1 × (+1) + 1 × (-1) = 0. The positive charge on one ion balances the negative charge on one
ion. The two ions would pair up at a 1:1 ratio.
The empirical formula for an ionic compound shows all the ions in the compound. Positive ions are written in front of negative ions. is positive and
is negative. The formula shall also show the simplest ratio between the ions. For the compound between Li and Br, a 1:1 ratio will be the simplest. The "1" subscript in an empirical formula can be omitted. Hence the formula: LiBr.