chemistry question . help pls...?

Question

1) Neutralization occurs when an acid is combined with a base. Which of the following is an example of neutralization?
a) adding an acid to water
b) using an antacid to treat heartburn
c) washing hair with a low pH shampoo
d) making soap

2) Sponge toffee is made by mixing sugar, corn syrup, vinegar, and baking soda. The reason bubbles form in the sponge toffee is
a) corn syrup produces bubbles when heated
b) sugar and vinegar produce a gas that creates the bubbles
c) mixing produces the bubbles by bringing air into the mixture
d) vinegar and baking soda react to produce carbon dioxide, which forms the bubbles




Here are my answers :
1 - b
2-d


but im not sure.. and can someone please explain to me the process of Neutralization?
thank you so much!

Answer 1

You have it correct.

Acid + Base ===> salt + water

Answer 2

Good question! I see your confusion here. Actually, when you add fire to wax then it's a bit of both. Wax will melt without fire though so just melting wax is a physical change when fire isn't involved. Let me try to explain. 1. Fire is a chemical reaction. It needs oxygen and another combustible material in order to occur. Oxygen is a VERY reactive element and when it reacts with another element or compound to create new compounds it gives off heat (called an exothermic reaction). 2. Candle wax is not an element but a mix of compounds. The elements that make up candle wax aren't all bonded chemically at the elemental level. A lot of it is just stirred in real well so that you can't see it. It's not attached to anything, just being held there by other compounds that differ in structure. This is called a homogeneous solution. If you mix oil and water together and shake very very well, you may get some of the oil not to float immediately to the top. Some of the oil gets suspended in the water. However, the two do not chemically combine, they just mix. The best way to demonstrate this would be to mix oil and water together really well, then freeze it fast before the oil can fully separate from the water. Once you have done this, you effectively have a candle. The oil in the frozen water will burn once exposed to the air, melting the ice causing more oil to be exposed. It won't burn all that fast (just like a candle) because all the oil in the water doesn't get exposed at once. This is due to the time it takes the fire from the little drops of oil to melt the surrounding ice. So, the answer to your question is it's both! It is a physical change because the heat from the fire melts the rest of the candle that is less flammable. The fire is a chemical reaction to compounds in the wax that are more combustible than the rest of the wax. Sorry for the length but who would have thought that just letting a candle burn is actually a complicated chain of events.

Answer 3

1

Answer 4

acids have free H+ ions running around. Bases have free OH- ions running around. They combine to form H2O. Whatever the acid and base were paired with generally also pair together to make a salt, gas or other more neutral compound. in the case of antacid, its a Cl (from they HCl) salt depending on what antacid you use. in the case of the toffee, sodium bicarbonate (NaHCO3) pulls off H+ ions from the acid to form H2CO3 (which forms H2O and CO2 when heated - think soda pop) and Sodium Acitate. acids and bases are naturally unstable because they have weak holds on their ions, and want to give them away for more stable formations. hope this helps. your answers are right btw.