Students were asked to answer a question at schools and to indicate what is most important for them to succeed. One that response stood out from the rest was practice. Successful persons are not born successful; they become successful via hard work and persistence. This is how you can achieve your goals. as follows are one of the answer and question example that you can certainly utilize to practice and enriches your knowledge and also give you insights that could just guide you to preserve your study in school.
Question:
He table below lists some acids and bases. Strong acids Weak acids Weak bases Strong bases HBr CH3COOH NH3 NaOH HNO3 HCOOH NH4OH KOH H2SO4 Ca(OH)2 Which salt has a pH < 7? A) KBr B) HCOOK C) CaSO4 D) NH4NO3
Answer:
Answer : Option D) 
Explanation :
Amongst the given list of acids and bases, following are the strong acids and weak acids
Strong Acid: HBr, and
Weak Acid: and HCOOH
And strong bases with weak bases are given below;
Strong Base: NaOH, KOH and
Weak Base: and
Now, Acid + Base → Salt + Water
so, the salt of strong acid and weak base which will have pH < 7
will be
because of the following acid base reaction (neutralization reaction)
+
↔
+
They will possibly hopefully help the student sort out the question by making use of the questions and answer examples. Then possibly will have some sharing in a group discussion and also learning with the classmate with regard to the topic, so another student also attain some enlightenment and still keeps up the school learning.