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Chapter 20: Problem 16

Write a balanced equation and give the names of the products for the reaction of (a) sodium peroxide and water. (b) calcium and oxygen. (c) rubidium and oxygen. (d) strontium hydride and water.

Short Answer

Expert verified
Short Answer: (a) The balanced equation for the reaction between sodium peroxide and water is 2Na2O2 + 2H2O -> 4NaOH + O2. The products formed are sodium hydroxide and oxygen. (b) The balanced equation for the reaction between calcium and oxygen is 2Ca + O2 -> 2CaO. The product formed is calcium oxide. (c) The balanced equation for the reaction between rubidium and oxygen is 4Rb + O2 -> 2Rb2O. The product formed is rubidium oxide. (d) The balanced equation for the reaction between strontium hydride and water is SrH2 + 2H2O -> Sr(OH)2 + 2H2. The products formed are strontium hydroxide and hydrogen.

Step by step solution

01

Write the unbalanced equation

Write the formulas of sodium peroxide (Na2O2) and water (H2O), and form an unbalanced equation: Na2O2 + H2O -> ?
02

Predict the products

Sodium will react with hydroxide ions from the water to form sodium hydroxide (NaOH) and oxygen gas (O2) will be released, giving us this unbalanced equation: Na2O2 + H2O -> NaOH + O2.
03

Balance the equation

Balance the number of atoms of each element on both sides of the equation: 2Na2O2 + 2H2O -> 4NaOH + O2 The balanced equation is: 2Na2O2 + 2H2O -> 4NaOH + O2 The product names are sodium hydroxide and oxygen. #(b) Calcium and oxygen#
04

Write the unbalanced equation

Write the formulas of calcium (Ca) and oxygen (O2), and form an unbalanced equation: Ca + O2 -> ?
05

Predict the product

Calcium reacts with oxygen to form calcium oxide (CaO): Ca + O2 -> CaO.
06

Balance the equation

Balance the number of atoms for each element on both sides: 2Ca + O2 -> 2CaO The balanced equation is: 2Ca + O2 -> 2CaO The product name is calcium oxide. #(c) Rubidium and oxygen#
07

Write the unbalanced equation

Write the formulas of rubidium (Rb) and oxygen (O2), and form an unbalanced equation: Rb + O2 -> ?
08

Predict the product

Rubidium reacts with oxygen to form rubidium oxide (Rb2O): Rb + O2 -> Rb2O.
09

Balance the equation

Balance the number of atoms of each element on both sides of the equation: 4Rb + O2 -> 2Rb2O The balanced equation is: 4Rb + O2 -> 2Rb2O The product name is rubidium oxide. #(d) Strontium hydride and water#
10

Write the unbalanced equation

Write the formulas of strontium hydride (SrH2) and water (H2O), and form an unbalanced equation: SrH2 + H2O -> ?
11

Predict the products

Strontium hydride reacts with water to form strontium hydroxide (Sr(OH)2) and hydrogen gas (H2): SrH2 + H2O -> Sr(OH)2 + H2.
12

Balance the equation

Balance the number of atoms of each element on both sides of the equation: SrH2 + 2H2O -> Sr(OH)2 + 2H2 The balanced equation is: SrH2 + 2H2O -> Sr(OH)2 + 2H2 The product names are strontium hydroxide and hydrogen.

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