Concept explainers
(a)
Interpretation:
Each binary hydride should be identified as ionic, covalent or interstitial.
Concept introduction:
The location of each element in the periodic table determines the formula of the hydride it forms. Alkali metals form ionic hydrides and have the formula
(b)
Interpretation:
The oxidation state of hydrogen and the other element in compounds (1), (2) and (3) should be determined.
Concept introduction:
In ionic hydrides, hydrogen is in oxidation state and in other types of hydride, hydrogen is in
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CHEMISTRY-W/MASTERING CHEMISTRY ACCESS
- (a) One of the alkali metals reacts with oxygen to form a solidwhite substance. When this substance is dissolved in water,the solution gives a positive test for hydrogen peroxide, H2O2.When the solution is tested in a burner flame, a lilac-purpleflame is produced. What is the likely identity of the metal?(b) Write a balanced chemical equation for the reaction ofthe white substance with water.arrow_forwardConsider the following three statements about the reactivityof an alkali metal M with oxygen gas:(i) Based on their positions in the periodic table, the expectedproduct is the ionic oxide M2O.(ii) Some of the alkali metals produce metal peroxides or metalsuperoxides when they react with oxygen.(iii) When dissolved in water, an alkali metal oxide produces abasic solution.Which of the statements (i), (ii), and (iii) is or are true?(a) Only one of the statements is true.(b) Statements (i) and (ii) are true.(c) Statements (i) and (iii) are true.(d) Statements (ii) and (iii) are true.(e) All three statements are true.arrow_forwardWrite equations for the following reactions:(i) Dilute sulphuric acid reacts with zinc granules(ii) Dilute hydrochloric acid reacts with magnesium ribbon.(iii) Dilute sulphuric acid reacts with aluminum powder.arrow_forward
- Which of the following statements are true?(a) Si can form an ion with six fluorine atoms, SiF62-,whereas carbon cannot.(b) Si can form three stable compounds containing two Siatoms each, Si2H2, Si2H4, and Si2H6.(c) In HNO3 and H3PO4 the central atoms, N and P, havedifferent oxidation states.(d) S is more electronegative than Se.arrow_forwardWrite a balanced chemical equation for the reaction of an excess of oxygen with each of the following. Remember that oxygen is a strong oxidizing agent and tends to oxidize an element to its maximum oxidation state.(a) Mg(b) Rb(c) Ga(d) C2H2(e) COarrow_forwardWrite a balanced equation for (a) the combination reaction between lithium metal and fluorine gas and (b) the decompositionreaction that occurs when solid barium carbonate is heated (two products form, a solid and a gas).arrow_forward
- The elements sodium, aluminum, and chlorine are in the same period. (a) Which has the greatest electronegativity? (b) Which of the atoms is smallest? (c) Which is the largest possible oxidation state for each of these elements? (d) Will the oxide of each element in the highest oxidation state (write its formula) be acidic, basic, or amphoteric?arrow_forwardAluminum reacts with iodine in the presence of hot water, to exothermically produce aluminum iodide. Give the Balanced chemical equation involved.arrow_forwardWrite the chemical formula for each of the following compounds,and indicate the oxidation state of the halogenor noble-gas atom in each: (a) chlorate ion, (b) hydroiodicacid, (c) iodine trichloride, (d) sodium hypochlorite,(e) perchloric acid, (f) xenon tetrafluoride.arrow_forward
- A sample of 70.5 mg of potassium phosphate is added to 15.0 mL of 0.050 M silver nitrate, resulting in the formation of aprecipitate. (a) Write the molecular equation for the reaction. (b) What is the limiting reactant in the reaction? (c) Calculatethe theoretical yield, in grams, of the precipitate that forms.arrow_forwardGive the oxidation number for element noted in each of the following molecules or ions. (a) V in VO4* The oxidation number for V is: (b) S in Ce(SO4)2 The oxidation number for S is:arrow_forwardAll alkali metals and akaline earth metals are strong reducing agents and couldbe oxidized by water. Write a general reaction equation for the oxidation of both.arrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningChemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax