Sample tested Ofser vation (when tested Did the sample e with the L.E.D Indicato

Question

Sample tested Ofser vation (when tested Did the sample e with the L.E.D Indicator) electricity? Deionized (Write"Yes,or"Nant-o-electrolyte water 1 in the 1. Tap water lab. 2. NaCI (IM) 3. NaoH (OM) Red Green 4. Ethanol (IM) ed o electrolyte 5. HCI (M)P 6. CH COOH (1M) o none o electrolyte 7. NH, (IM) Red o none Answer question 2 in lab. 8. (a) NaCI (6) no o electrolyte (b) NaCI(s) + waterKa o nonelectrolyte 01. List two substances that appear to be strongly conducting (strong electrolytes) Q2. List two substances that appear to be weakly conducting (weak electrolytes).

Explanation / Answer

A strong electrolyte will disscociate into ions and conduct electricity effectively. This conductivity is manifested in the form of light emitted by the LED bulb lighting up.

A weak electrolyte weakly dissociates into low number of ions that poorly conduct electricity. The LED light would be low in intensity as a result (dim).

A non electrolyte does not dissociate into any ions and thus does not conduct electricity at all. Thus, the LED light will not light up.

We must also remember that the electrolytes must be prepared in aqueous solutions in order to conduct electricity. Electrolytes in solid state will not conduct electricity due to lack of dissociated ions.

Looking at the above chart (specifically the LED indicator column) we can easily tell if a solution is an electrolyte or a non-electrolyte.

1.] The two substances that appear to be strongly conducting are HCl (1 M) and NaOH (1 M).

2.] The two substances that appear to be weakly conducting are tap water and CH3COOH (1 M).

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.