Precipitation Reactions - Directions

Using the Precipitation Reactions and Net Ionic Equations Concept Builder is quite simple. There are three activities in all. In the first activity - Soluble or Insoluble? - you are given the names or chemical formulas of three ionic compounds. You must identify either all those that are soluble in water or insoluble in water. You can select answers by tapping on the answer option or the radio button located to the left of the option. When selected, the words will turn red and the radio button will show a red center. If you change your mind, then simply tap on a different option. As long as you have an answer option selected, the Check Answer button will be visible. You must select all that apply. If you need help with either the Solubility Rules or the formulas and names of polyatomic ions, there are buttons that will pop up screens with such information. Once you are satisfied with your choices, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated.

In the second activity - What's Going Down?- you must identify the chemical formula of the precipitate that is formed by the reaction of two aqueous solutions of ionic compounds. Answers can be selected by tapping on the option or on the radio button next to the option. When selected, the text of the selected answer will be highlighted in red and the radio button to the left of the answer option will display a red center. Once you have chosen an answer, the Check Answer button will be visible. If you are satisfied with your choice of an answer, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated. If you need to change an answer, then tap on a different choice or deselect the current choice by tapping on it.

In the third activity - Net Ionic Equations - you must identify the net ionic equation for the precipitation reaction occuring when two aqueous solutions of an ionic compound are mixed. The question begins by first identify the two ions that will react to form the precipitate. You do so by tapping on the ion names or the radio button next to the ion names. Once you have selected two ions - a cation and an anion - tap on the Pick These 2 button. If correct, you will be given the next part of the question - to identify the net ionic equation for the reaction of these two ions. If incorrect, you will be given such feedback and given another opportunity to answer the question. As for the net ionic equation part of the question, there are five answer options given. You can select a choice by tapping on the option or on the radio button next to the option. When selected, the text of the selected answer will be highlighted in red and the radio button to the left of the answer option will display a red center. Once you have chosen an answer, the Check Answer button will be visible. If you are satisfied with your choice of an answer, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated. If you need to change an answer, then tap on a different choice or deselect the current choice by tapping on it.

The selected choice will be surrounded by a box with a red border. If you change your mind, tap on the same answer to deselect it or tap on a different answer option. As long as you have selected an answer, the Check Answer button will be visible. If you are satisfied with your choice of an answer, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated. If you need to change an answer, then tap on a different choice or deselect the current choice by tapping on it.

Your goal is to earn "Stars" and to complete one or more activities. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular activity, you will earn the trophy for that activity.