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Which one of the following ions is classified incorrectly?

Which one of the following will form a buffer?

What is the pH of a buffer containing 0.15 M HClO (aq) and 0.15 M NaClO (aq)?

Classify each of the following as an acidic, basic, or neutral salt, and then answer the following question. Which one of the following is an acidic salt?

On scratch paper, balance the following redox reaction in basic solution, and then answer the question below. MnO4- + I- 

For a buffer containing HF (aq) and NaF (aq), what ratio of ([F-]/[HF]) is needed to give a buffer of pH 3.5?

Steve is going on vacation. He brings 8 different colored t-shirts and 4 pants. How many different outfits could he have on vacation? a)  Write the equation that represents this situation. b)  Draw a diagram that could be useful in representing this situation.

Use the standard algorithm to compute 283 ÷ 8. In this case, have 8 represent how many are in each group. a)  What does the quotient represent in this interpretation of division? b)  In step 1 of the standard algorithm, we often ask the question, “Does 8 go into 2?” Why is the answer ‘No,’ when 8 clearly does go into 200? c)  In step 2 of the standard algorithm, we often ask the question, “Does 8 go into 28?” What does the 28 represent? d)  What does the phrase, “goes into” mean? Think about the interpretation of the divisor as either the number of groups or how many are in each group. e)  What does it really mean to “bring down” the 3 in the standard algorithm?

Rewrite the following numbers using the indicated place value. The first one is given. a)  23,400 as hundreds : 234 hundreds b)  7,234 as tens c)  9,800,000 as millions d)  6,500,000 as tens e)  82,000,000 as hundreds f)  4,005,267 as thousands

Point charge q1 = –20nC is located at (0, 0)m,  poiont charge q­2 = 30nC is located at (4.0, 0)m. a) Find the electric potential at (4.0, –6.0)m. b)  How much energy, in Joules, is required move point charge q3 = 10mC from very far away to the location (4.0, –6.0)m?