Sample to be tested meter reading Ions or molecules causing conductivity or non-

Question

Sample to be tested meter reading Ions or molecules causing conductivity or non-conductivity (be specific where possible) reasons for the presence of these Ions or molecules Tap H_2O (If no conductivity, notify instructor) Distilled H_2O (pure covalent) 0.10M NaOH (strong base) 0.10M NH_4OH (may also be labeled NH_3(aq)) (weak base), 0.1M HC_2H_3 O_2 (weak acid) Water solution of sucrose (C_12H_22O_11) (covalent-neither acid nor base) Solid NaCI (ionic) Put just enough in a dry beaker to cover the bottom of dry electrodes (use for Part 8) NaCI(aq) (add water to the solid from above (tap or distilled?) 0.1 OM HCI (strong acid)

Explanation / Answer

Q1.

Tap H2O, shoul dhave moderate conductivity due to Mg+2, Na+, mainly c.. ions in solutoin

reactions for Mg, use CO3-2

Mg+2 + CO3-2 = MgCOs(s)

Ca+2 + CO3-2 = CaCOs(s)

Q2

for H2O distilled, no ions is present, so assume no conductivity and no reactions needed

Q3

For NaOH, there is Na+ and OH- presence

Na+ is most liekly to conduce electrcity,

There is no direct way to precipitate Na+, instead, we use flame test

Q4.

NH4+ and OH-

very weak conductivity since NH4+ is weak base, meanin NH3 ni solution is scarse

Q5.

HC2H3O2, acetic acid, pretty moderate and low conductivity, use any base for presence

HC2H3O2 + OH- = H2O + C2H3O2-

Please consider posting multiple questions and subquestions in different set of Q&A. According to Chegg's guidelines, we are not allowed to answer to multiple questions in a single set of Q&A

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

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