Chemistry, 17.07.2019 01:30 batmanmarie2004

Use the following table to answer the question. strong acids weak acids weak bases strong bases hbr ch3cooh nh3 naoh hcl hf nh4oh koh h2so4 hcn cu(oh)2 ca(oh)2 which of these salts has the highest ph? k2so4 cu2so4 nh4cl nach3coo

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Answer from: beserkerbradley5863

The salt which has the highest pH is CH_3COONa

Explanation: Salts are formed by the reaction of acid and base. General equation for the generation of salt is given by:

$HX+BOH\rightarrow BX+H_2O$

The given salts are formed from the reaction of acids and bases.

1) K_2SO_4

This is a salt formed by the reaction of strong base (KOH) and strong acid (H_2SO_4) . So, this salt is a neutral salt.

$H_2SO_4+2KOH\rightarrow K_2SO_4+2H_2O$

2) CuSO_4

This is a salt which is formed by the reaction of weak base (Cu(OH)_2) and strong acid (H_2SO_4) . So, this salt is an acidic salt.

$H_2SO_4+Cu(OH)_2\rightarrow CuSO_4+2H_2O$

3) NH_4Cl

This is a salt which is formed by the reaction of weak base (NH_3) and strong acid (HCl). So, this salt is an acidic salt.

$HCl+NH_3\rightarrow NH_4Cl$

4) CH_3COONa

This is a salt which is formed by the reaction of strong base (NaOH) and weak acid (CH_3COOH) . So, this salt is a basic salt.

$CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O$

Now, we have to find the salt which has the highest pH value.

Highest pH value means that the salt must be basic in nature and from the given salts, only CH_3COONa is basic salt. Hence, this salt has the highest pH value.

Answer from: Quest

oh it is true if thats what you are asking

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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Use the following table to answer the question. strong acids weak acids weak bases strong bases hbr...