Question

If the full equations/math could be provided it would help greatly. Thank you.

All the following salts are alkaline except

	LiClO
	NH4NO3
	SrCrO4
	K2HPO4

The pH after adding 21.0 mL of 1.0 M NaOH to 25.0 mL of 1.0 M HCl is

	0.087
	0.16
	0.80
	1.1

What is the pH when 20.0 mL of 1.00 M NaOH has been added to 25.0 mL of 1.00 M CH₃COOH (Ka=1.8x10^-5)?

	4.14
	0.70
	5.35
	0.95

You can make a buffer with all the following except

	using an amphoteric chemical by itself
	weak base + salt of weak base
	weak acid + salt of weak acid
	weak acid + conjugate base

Answer 1

1. When strong base and weak acid react to give salt and water, that salt is known as alkaline salt.

Example: Strong base : NaOH, Weak acid CH3COOH

The alkaline salt produced is CH3COONa

Let's check each option one by one

First, LiClO formed from LiOH a strong base and HOCl a weak acid, hence a alkaline salt.

Second, NH₄NO_​​3 is formed from HNO_{​​​​3} a strong acid and NH₄OH a strong base, hence it will be a Acid Salt

Third, SrCrO4 made from Sr(OH)2 (strongly basic)+ H₂CrO_{4. ⁽}Strongly acidic) so this will be a Neutral Salt

Fourth, K2HPO4 is made from H3PO4 a strong acid and KOH a strong base, hence it forms a Neutral salt

Water is formed in product for all of the reactions.

Answer: Options 2, 3 and 4.

As per. HOMEWORKLIB POLICY I can answer only 1 question per query, please ask again with question number if you want to know answer to any other question. ( Buffers are made from weak acid/base and salt of its conjugate base/acid)