CHML.201 Name: Preliminary Questions, Answer all the questions in the space prov

Question

CHML.201 Name: Preliminary Questions, Answer all the questions in the space provided. 1. Balance the following equations: i), Ca(OH)2(s) + HCl(aq) Ans: Expt, 55 Date: ii) Nal 1CO3(s) + HNOs(aq) Ans. iii) NH3(aq) + HCIO4(aq) Ans. iv) H2C:04aq) + KOH(aq) Ans. 2. Calculate the volume of 0.3025 M HCI that would be needed to neutralize exactly 0.2505 g of CaO according to the reaction: CaO(s) + 2 HCl(aq) MgCl2(aq) + H2O(l) Ans.: 3. A 0.3076 g of Na2COj required 25.35 mL of a hydrochloric acid solution for complete neutralization Na2CO3(aq) + 2 HCl(aq) 2 NaCl(aq) + CO2(g) + H:00) What is the molarity of the HCl solution? Ans.:

Explanation / Answer

1 (a) Ca(OH)2(s) + 2 HCl(aq) ----> CaCl2(aq) + 2 H2O(l) Reaction type = double replacement

(b) HNO3 (aq) + NaHCO3 (s)  -----> NaNO3 (s)  + H2O (aq) + CO2 (g)  Reaction type = double replacement

(c) NH3 (l) + HClO4 (aq) ----> NH4ClO4 (s)   Reaction type = Addition

(d) H2C2O4 (aq) + 2 KOH (aq) -----> K2C2O4 (s) + 2 H2O (aq) Reaction type = double replacement

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