Concept explainers
Consider all of the following ionic compounds to be water soluble, and write the formulas of the ions that would be formed if the compounds were dissolved in water. Table 4.7 will be helpful.
a.
b.
c.
d.
e.
f.
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Chapter 5 Solutions
Chemistry for Today: General, Organic, and Biochemistry
- 1.In an ionic compound, the charges of the ions must balance so the compound is neutral. Barium nitrate (Ba(NO3)2) forms ions in solution. What ions form when barium nitrate dissolves in water? 1.Ba2+ and NO3- 2.Ba2+ , N3-, O2- 3.Ba+ and NO3- 4. all of these are possible 2. In an ionic compound, the charges of the ions must balance so the compound is neutral. The combination of Ba2+ and CO32- produces a precipitate. What is the chemical formula? 3.Consider the following reaction: Cl2(aq) + 2Br-(aq) --> 2Cl-(aq) + Br2(aq) If this reaction occurs as written, which is the better oxidizing agent? 4. When Br2 dissolves in hexane, the hexane layer is ____________. 5. If the hexane layer is purple, what halogen does it contain?arrow_forwarda) If atoms of metal calcium were to react with non-metal fluorine F2:i. How many electrons would each calcium atom lose?ii. How many electrons would each fluorine atom gain?iii. How many calcium atoms would be needed to react with each fluorine molecule?iv. What charges would the resulting calcium and fluoride ions have?b) Write the reactions for both calcium and fluorine, involving the transfer of electrons in (a).arrow_forward1. A compound that contains only nitrogen and oxygen is 30.4 % nitrogen by mass; the molar mass of the compound is 92.0 g/mol. What is the molecular formula of the compound? 2. Which of the following pairs represent soluble ionic compounds? a. KClO3 and AlPO4 c. BeS and BeCl2 b. (NH4)2CO3 and MgCO3 d. NaC2H3O2 and PbBr2arrow_forward
- Zn + 2 HCl ------> ZnCl2 + H2 2) When HCl(aq) is poured over the zinc metal, the liquid begins to fizz with small bubbles. What are the bubbles made of? Combustion Tests of Hydrogen –arrow_forward3.29 Classify each of these as an acid or a base. Which are strong and which are weak? What ions are produced when each is dissolved in water? (a) KOH, (b)Mg(OH)2,(c) HClO, (d) HBr, (e) LiOH, (f) H2SO3.arrow_forwardHydrogen peroxide is used as a cleansing agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes on contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic microorganisms); and it foams on contact with blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxide can be prepared by the action of an acid on an alkaline earth metal peroxide, such as barium peroxide: BaO2(s)+2HCl(aq)H2O2(aq)+BaCl2(aq) What mass of hydrogen peroxide should result when 1.50 g barium peroxide is treated with 25.0 mL hydrochloric acid solution containing 0.0272 g HCI per mL? What mass of which reagent is left unreacted?arrow_forward
- What does it mean to say an equation is balanced? Why is it important for an equation to be balanced?arrow_forwardWhat does it mean to say that mercury (II) halides are weak electrolytes?arrow_forwardAn astronaut excretes about 2500 g of water a day. if lithium oxide (Li2O) is used in the spaceship to absorb this water, how many kilograms of Li2O must be carried for a 30 day space trip for three astronauts? Li2O + H2O -------> 2 LiOHarrow_forward
- The density of the 99.8 ml solution is 1,093 g/ml and it contains 12% KI by mass. This solution is added to 96.7 ml of solution containing 14% Pb(NO3)2 by mass and density of 1,134 g/ml .Calculate the mass of PbI2 formed? (Ma: K: 39,098 g/mol; I: 126,905 g/mol; Pb: 207,2 g/mol; N: 14 g/mol; O: 16 g/mol) Pb(NO3)2 (aq) + 2 KI (aq) à PbI2 (k) + 2 KNO3 (aq)arrow_forwardIn experiment 1, the table sugar reacted and undergoes a chemical change when heated with flame compared with table salt because: I. Table sugar has a larger molecular weight than table salt.II. The covalent bond in sugar is weaker than the ionic bond of table salt. III. Table sugar has oxygen atoms making it an easily oxidizable compound.arrow_forwardWhy do ionic solids NOT conduct electricity but ionic solids dissolved in water (aq) do conduct electricity?arrow_forward
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