2018年4月20日 · In a hydroxide (OH −) ion, we see that the total charge of the ion is −1. That means, the total sum of the oxidation numbers of the elements present in the ion totals out to be −1. The ion has one oxygen atom and one hydrogen atom. Hydrogen is less electronegative than oxygen, and so will possess its usual +1 state.

2016年6月1日 · Here's a concept map that shows how to get from any of these to the other. [ Really, the only things you need to remember are: pX = −log10(X) pKw = 14 at 25∘C and 1 atm Kw = [H+][OH−] = 10−14 at 25∘C and 1 atm You don't need to know that pH+pOH = pKw... you can derive that by taking the −log10 of both sides of the Kw expression!

2014年5月8日 · The pH + pOH = 14 The pOH = -log[OH-] The pH is measure of acidity of a solution whereas the pOH is a measure of basicity of a solution. The two expressions are opposites expressions. As the pH increases the pOH decreases and vice versa. Both values equal 14. To convert a concentration of into pH or pOH take the -log of molar concentration of the hydrogen ions or the molar concentration of the ...

2018年1月5日 · In this case it is easiest to recognize the OH^- as a base (check: yes, it would accept a proton). That means the other compound on the right must be the acid. BOTH are "conjugates" of the original acid-base pair on the reactant side, so the original "acid" is H_2O (because the conjugate base is the OH^-) and the original base is the C_5H_5N.

Balancing a redox reaction requires identifying the oxidation numbers in the net ionic equation, breaking the equation into half reactions, adding the electrons, balancing the charges with the addition of hydrogen or hydroxide ions, and then completing the equation.

Conjugate acids and conjugate bases are the acids and bases that lose or gain protons. NH4+ is the conjugate acid to the base NH3, because NH3 gained a hydrogen ion to form NH4+.The conjugate base of an acid is formed when the acid donates a proton.

pH is the measure of acidity or basicity of a solution. pH less than 7 indicates acidity and pH greater than 7 indicates basicity.

2016年3月22日 · The reaction will produce copper (II) hydroxide, Cu(OH)2, an insoluble ionic compound that precipitates out of solution, and aqueous sodium nitrate, NaNO3, another soluble ionic compound.

Calculate [OH-] ions in a 0.125 M solution of nitrous acid. Is this solution acidic or basic; how do you know? Make sure you include the ionization equation.

2017年5月26日 · Based on the various results they've gotten, the ideal orders are likely 1 and 0, respectively, for what they did r(t) = k[CV+], since the concentration of OH− they used was so much larger than that of CV+, thus rendering the OH− concentration effectively constant, and the order with respect to OH− effectively zero.