MethodStep 1 – Remove your jacket and put on your goggles for health and safety reasons.Step 2 – Gather the following equipment –Thermometer – to check the temperatureConical flask – to contain the acid1 liter breaker – contain waterMeasuring cylinders x2 50ml 25ml White – for weighing marble chips CaCO3 marble chips – which react with hydrochloric acid Stopwatch – to time the start of the reaction Delivery tube – to pass airField stand – to hold the equipment Bosone – heats the water Tripod – to hold the glass at a certain height which has more hot ice - to cool the water of a certain tempered test tube stand - so you don't burn your hand and it's safe . Step 3: Set up all your equipment. A- Support with clamp. B- Measuring tube (25 ml) C- Delivery tubeD- Conical flask E- Reaction "what's happening" F- ThermometerG- Beaker H- Boson I- TripodJ- Water K- 1 liter beakerStep 4- My partner has weighed the marble chips on the scale, the quantity we used was 1 g. Step 5- I poured the hydrochloric acid into the 50ml measuring tube, the amount we used was 40ml. Step 6- I filled the measuring tube with water, put my thumb on top and pressed hard so that there was no air. Step 7- I filled the large glass with water and placed it near the caliper holder. Step 8- I used the measuring tube, turned it upside down and put it into the glass that contains water make sure there is no air trapped in the measuring tube. Step 9- Make sure the delivery tube is mounted so that the air created by the marble enters the tube and not the air...... in the center of the paper ......experiment I was able to improve many things like changing the size of the marble, the time, and the heat. The marble we used at the start of the experiment was too large, meaning that the reaction speed was reduced a lot, to overcome this problem we made sure to have a small marble so that the experiment could be reliable and have a good result. on time or too soon. You can see from the table at 35 that the average time does not match the time before and after the temperature, the reason may be that we did not control the temperature correctly or maybe we had large rocks on the surface is too little or we did not read the time correctly or we didn't stop it in time, to overcome this problem we need to double check the time and pay special attention to timing.