Science Homework Help

1. Write the formula of the conjugate base for acid H2CO3.

Express your answer as an

ion.

2. Calculate the [OH−] of each aqueous solution with the following [H3O+]:

stomach acid, 4.5×10−2M

Express your answer using two significant figures.

urine, 6.0×10−6M

Express your answer using two significant figures.

orange juice, 2.2×10−4M

Express your answer using two significant figures.

bile, 7.0×10−9M

Express your answer using two significant figures.

3.what is the balanced equation for the neutralization of each of the following.

 H2SO4(aq) and KOH(aq)

Express your answer as a chemical equation. Identify all of the phases in your answer.

HCl(aq) and Al(OH)3(s)

Express your answer as a chemical equation. Identify all of the phases in your answer.

H2SO3(aq) and Mg(OH)2(s)

4. What is the chemical formula for the base cobalt(III) hydroxide?

Express your answer as a chemical formula.

The formula for the selenate ion is SeO42−. Predict the formula for selenic acid.

5. How many moles of Ba(OH)2 are present in 125 mL of 0.600 M Ba(OH)2?

Express your answer with the appropriate units.