Question

NaHCO3+HC2CH3O2-> NaC2H3O2+H2O+CO2
(12g) (25g) (10g) (20g) (?g)
This equatiob represents the chemical reactiob between Baking Soda and VInegar
1)identify the reactants and the products
REACTANTS:
PRODUCTS:
2) Is the equation balanced?show how you know
3) What is the evolume of the missing (g) for the product? shouw your work
What 3 things could the students in this video have done to make their electromagnet pick up more paper clips

Answer 1

1) Identify reactants and products
- Reactants: NaHCO3 (baking soda) and HC2H3O2 (acetic acid, vinegar)
- Products: NaC2H3O2 (sodium acetate), H2O (water), CO2 (carbon dioxide)

2) Is the equation balanced? Show how you know
Equation: NaHCO3 + CH3COOH -> CH3COONa + H2O + CO2

Count atoms on each side (one molecule of each):
- Left: Na 1, C 3 (1 from NaHCO3 + 2 from CH3COOH), H 5 (1 + 4), O 5 (3 + 2)
- Right: CH3COONa (C2 H3 O2 Na1) + H2O (H2 O1) + CO2 (C1 O2) gives
Na 1, C 3 (2 + 1), H 5 (3 + 2), O 5 (2 + 1 + 2)

All element counts are equal, so the equation is balanced (all coefficients = 1).

3) Find the missing product mass (show work)
Masss must be conserved. Total mass of reactants = total mass of products.

Given masses:
- Reactants: 12 g (NaHCO3) + 25 g (vinegar) = 37 g total
- Products given: 10 g (sodium acetate) + 20 g (water) = 30 g known
- Missing product mass (CO2) = total reactants − known product masses = 37 g − 30 g = 7 g

So the missing product mass is 7 g CO2.

Note: If you checked stoichiometric masses by moles, the listed product masses (10 g and 20 g) do not match what the balanced reaction would predict from 12 g NaHCO3; but using conservation of mass with the numbers given, the missing mass is 7 g.

Extra: three ways to make an electromagnet pick up more paper clips
1. Increase the number of turns of wire around the iron core — more turns increase the magnetic field strength for the same current.
2. Increase the current through the coil (more batteries or higher voltage, or reduce circuit resistance) — stronger current produces a stronger magnetic field. (Be careful not to short batteries or overheat the wire.)
3. Use a soft iron core (a clean iron nail) and wrap the coils tightly and closely around it — a ferromagnetic core concentrates and strengthens the field compared with air or a nonmagnetic core.