Does the carbon dioxide obtained from baking soda and vinegar support the burning of the candle?

Select one of the hypotheses and justify it.

Carbon dioxide is a gas that supports the burning of a candle.
Carbon dioxide is a gas that does not supports the burning of a candle.

• plastic bottle,

• baking soda,

• vinegar,

• balloon,

• tea light,

• two beakers,

• funnel.

1. Pour a small amount of vinegar into the bottle (maximum 1/3 of the bottle's volume).

2. Add a teaspoon of baking soda into the balloon using a funnel.

3. Light a candle placed inside the beaker.

4. Place the balloon outlet on the neck of the bottle, and then add soda to the vinegar.

5. Fill the second beaker with gas accumulated in the balloon.

6. „Transfer” carbon dioxide into a beaker with a lighted candle.

7. Observe the changes.

R1G3ruaexdAfL

Ilustracja dotycząca eksperymentu. Cztery etapy: 1. Balon nałożony na szyjkę butelki, napełniony. 2. Napełniony balon nad zlewką., 3. Zapalona świeczka na dnie zlewki., 4. Zlewka z etapu drugiego - nad którą znajdował się balon - przyłożona do wylotu zlewki ze zgaszoną świeczką.

In what order will carbon dioxide blow out the candles placed in a beaker at different heights?

Select one of the hypotheses and justify it.

The carbon dioxide collected in the beaker will blow out the candles, starting from the lowest one. The carbon dioxide collected in the beaker will blow out the candles, starting from the highest one.

• calcium carbonate,

• hydrochloric acid,

• conical flask,

• a beaker with candles located at different heights,

• cork with dropper and drain tube.

1. Add diluted hydrochloric acid to the flask with calcium carbonate.

2. Cork the flask with using cork with dropper and drain tube.

3. Carefully light the candles, then place the end of the drain tube in the beaker.

4. Observe the changes.

RH3lkXjAoKBbN

Na ilustracji dwie zlewki. Do zlewek włożona jest rurka. W pierwszej i drugiej zlewce na czterech stopniach stoją świeczki. Rurka przechodzi przez środek zlewki. W pierwszej zlewce wszystkie świeczki są zapalone. W drugiej zlewce dwie świeczki stojące najniżej są zgaszone.

As a result of the reaction of calcium carbonate with hydrochloric acid gas bubbles are emitted. The reaction is described by the equation

$\text{CaC}{\text{O}}_{\text{3}}\text{+ 2HCl → Ca}{\text{Cl}}_{\text{2}}\text{+ C}{\text{O}}_{\text{2}}\text{+}{\text{H}}_{\text{2}}\text{O}$

The beaker gradually fills up with gas that accumulates on the bottom of the beaker, blowing out the candles. First, the lowest candle is blown out, and at the end – the highest one. The emitted gas is carbon dioxide, which does not support combustion and is heavier than air.

How the presence of carbon dioxide can be detected?

Select one of the hypotheses and justify it.

Carbon dioxide, when introduced into limewater, causes a colour reaction. Carbon dioxide, when introduced into limewater, causes its clouding.

• two test tubes or small beakers,

• a straw,

• limewater.

1. Pour the same amount of limewater into both test tubes or small beakers.

2. Insert one end of the tube or straw into one of them and blow in the air out of the lungs.

3. Observe the changes.

R6VZ97Z5bNwmo

Ilustracja prezentuje dwie zlewki. W jednej trzy czwarte objętości zajmuje szary płyn - woda wapienna. W drugiej płyn jest biały. Włożony jest do niej koniec rurki. W białym płynie bąbelki gazu - tlenku węgla cztery.

What is the use of dishwashing soap in the experiment?

Dishwashing soap causes the formation of carbon dioxide. The addition of dishwashing soap causes the formation foam.

• plastic bottle with dispenser,

• baking soda,

• citric acid,

• dishwashing soap,

• beaker,

• candle.

1. Pour 200 ml of water into an empty bottle.

2. Add two teaspoons of baking soda and shake.

3. Add about 30 ml of dishwashing soap and shake again.

4. Using a funnel, quickly add three heaping teaspoons of citric acid.

5. Cork the bottle very quickly.

6. On a foil, for example a painter foil, place a burning candle in a beaker, then shake the contents of the bottle, point the outlet of the home‑made fire extinguisher over the candle and pull the cork to open it.