Need chem help on the following problems! Any additional information would be gr

Question

Need chem help on the following problems! Any additional information would be great. I would love to see the work involved so I could use it as reference to similar problems.

1.

Oxalic acid (H2C2O4) is weak acid found in the leaves of rhubarb. Which of the following solutions will have the highest pH?

1.0 M H2C2O4

0.5 M H2C2O4

1.0 × 10–4 M H2C2O4

0.00075 M H2C2O4

2.

Which of the following is a polyprotic acid?

HCl

HNO3

H2SO4

H3PO4

both c and d

3.  

In the reaction of NaOH with HBr, a spectator ion is:

Na+ only

Br– only

H+ only

OH– only

both Na+ and Br–

Na+, H+,OH– ,and Br–

4.  

onsider the following reaction.

This reaction indicates that:

5. What is the pH of a solution prepared by dissolving 0.400 g of HCl in enough water to produce 300.0 mL of solution?

6.  

In converting from the pH of a solution to the corresponding H3O+ concentration, the following equation should be used.

[H3O+] = 10–pH

A. True

B. False

1.0 M H2C2O4

0.5 M H2C2O4

1.0 × 10–4 M H2C2O4

0.00075 M H2C2O4

Explanation / Answer

1)a 1.0 M H2C2O4

This is because when the molarity is higher, the acid is more concentrated, therefore more acidic, which will make the solution moreacidic, hence the lower the pH

2)e.both c and d

Polyprotic acids are specific acids that are capable of losing more than a single proton per molecule inacid-base reactions.

both Na+ and Br–

both Na+ and Br–

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