Investigating Polyatomic Ions PDF

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Investigating Polyatomic Ions https://f2.app.edmentum.com/coursewaredelivery/e/preview/100000627/

******Using Edmentum - Complex Structures Tutorial, page 14. Complete the work there first, then TRANSFER your answers here.***** This activity will help you meet these education goals: ● You will use a model based on evidence to show the relationship between two or more systems. ● You will determine the meanings of symbols and key terms in a science text. Directions Read the instructions for this activity. Submit your response to each question, and check your answers. At the end of the activity, write a brief summary of your work. Activity In this activity, you’ll become familiar with the patterns in the names and formulas of polyatomic ions. Use this list of polyatomic ions to help you answer the questions. Part A

Question Study the ions that contain the element chlorine. What are some similarities between the formulas for these ions?

Select the (2) correct answers, by putting an “X” on the line. __X_ They

all contain oxygen. _X__ They all have a charge of 1–. ___ They all contain carbon. ___ They all contain two chlorine atoms.

Part B

Question Look for other families of ions in the table that follow a pattern similar to that of the polyatomic chlorine ions. Then complete the statement to describe what you find. Select the correct answer from each drop-down menu. Families of ions that contain _nitrogen________, __sulfur________ and __carbon________ follow a pattern similar to that of the polyatomic chlorine ions. Part C

Question Refer to the list of polyatomic ions. Pay attention to these pairs of ions: ● chlorate and chlorite ● nitrate and nitrite ● sulfate and sulfite From what you observe, what can you infer is the relationship between the formula of an ion whose name

ends with -ate and the formula of the corresponding ion whose name ends with -ite?

Put an ‘X’ on the (1) line with the correct answer. ___The ion that ends with -ate has one more negative charge than the ion that ends with -ite. _X__The ion that ends with -ate has one more oxygen atom than the ion that ends with -ite. ___The ion that ends with -ite has one more hydrogen atom than the ion that ends with -ate. ___The ion that ends with -ite has one more negative charge than the ion that ends with -ate. Part D

Question Study the formulas for polyatomic ions with the prefix hypo-. The formula for bromate is BrO . Using this formula and the pattern you notice in the table, match each chemical formula with its correct chemical name. Not all tiles will be used. 3

BrO2 –

BrO –

Pairs Bromate ___ BrO3 – ___________________

–

BrO3 –

BrO3 2–

Bromite _____BrO2 – ___________________ Hypobromate ____ BrO – _________________

Part E

Question Three ions that contain the element phosphorus are phosphate (PO ), hydrogen phosphate (HPO ), and dihydrogen phosphate (H PO ). Compare the formulas of these three ions. Also notice any other instances in which hydrogen is added to a polyatomic ion from the table. Then complete the description of the pattern you see. 4

3–

4

2

4

2–

–

Select the correct answer. When a hydrogen atom is added to a polyatomic ion, the amount of negative charge ___decreases by 1________. Following this pattern, we can see that hydrogen carbonate has a charge of __1-_______ and hydrogen sulfate has a charge of __1-______. Summary Write a summary of 5+ sentences, of what you just learned. What was hard, what was easy? I learned that the ion that ends with -ate has one more oxygen atom than the ion

that ends with -ite but has the same charge. I also learned that when a hydrogen atom is added to a polyatomic ion, the negative charge decreases by 1. The ions that contain the element chlorine all contain oxygen and have a charge of 1-. Surprisingly I had part E correct with one try so that was easy. The questions were not difficult but I keep on messing up part d however, I tried until it was correct....