Question

10) Given the towing chemical 2 K 3 K 2 K K - 2 C CE 2 Cb KCL 4 KC 2 KC KC d 2 C e the only one equation above that com Based on your selected equation above determine how many m o hon gas Cb will react with a total of 6.0 mots of potassium Korce your 6.0 moles Cla 3.0 moles Cl 20 mois Cle 40 mole Cb c Circle the type of reaction regarding above chemical equation Neutralization Combination Decomposition Combustion 11) During an experiment, 29.23g of NaCl is completely dissolved in 2000 ml water What is the molarity (M) of this NaCl solution? (1.5 points) (Show the mathematical calculations and circle the correct answer) Circle one: a) 58.45 mole L. b) 0.0146 mole L. c) 2.0 mole L. d) 0.25 molel - 0.999 molell 12) Indicate if each statement below is true or false (one error allowed) (3 points) a) A buffered solution shows a large change on pH values when an acid or a base is added b) A HCL solution with a concentration (H+] = 0.050 M shows a pH = 1.3 C) A strong base dissociates 100% in water producing hydroxide ions OH d) A solution with a pH = 9.0 is considered a basic solution e) The higher the pH value, the higher the acid concentration in solution 1) A solution of NaOH is considered an acid solution 9) The conjugate base of carbonic acid H2CO3 is the bicarbonate ion HCO3

Answer 1

Page No.: o @ 2K15) + Q G - 2.Klis a molte with 6 . 2 moles of k reacts with 6 moles of k will react - 1 x6 = 3 moles of cl. o 3 moles of Clan uy @ It is combination reaction O - molemmass Molar mass of Nall: 50.5 g/mol mole 29.23 -0.49 50.5 Volume - 2000 cal ml -103 l Volume 2000 x103 _ al. 0.49 = 0.25 m . mol

Page No.: 0.25 Date_LL a 0.25 moly e False - as Buffer solution bH Is anys resists as addition Change in boase. 6 p1= -log [ hot los 0-050 = 1.3 | ph= false! -log [ z of ] I false Non conpergate solution base is basic . obtained is stained by losing To a tt