Results/Questions 1. What evidence did you see in the experiment that a chemical reaction took place?
2. When citric acid reacts with baking soda, a salt, water and a gas are produced. What is the name of the gas?
3. In two or more complete sentences, explain the law of conservation of mass and how it relates to this experiment?
4. When vinegar, an acid, is mixed with baking soda, a base, the reaction is similar to the reaction of Alka-Seltzer and
water, a salt, water and carbon dioxide are produced. In two or more complete sentences, describe how your
knowledge of balancing chemical equations can help you to determine the missing compound.
NaHCO3 + HC2H302 -
+ H2O + CO2
5. In two or more complete sentences, design an extension of this experiment to determine the mass of the carbon
dioxide gas that was produced. Include a hypothesis regarding the mass of the gas in grams.
Submission Requirements
• Title of Lab:
• Summary of Procedures/Observations:
• Data Table
• Results/Questions:

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.