... change the concentration by adding easily-measured amounts of water to the acid to create different concentrations. Every 5 seconds of the experiment until 40 seconds I will record how much hydrogen is collected. I will do this because I predict that ...

... will not be accurate. * Then put the Magnesium into the flask with the Hydrochloric acid and start the stop clock. * Leave the stop clock running until we have collected 50cm3 of hydrogen the stop the clock and record our result. * ...

... every time the concentration is increased. Hypothesis = I predicted this since the more distilled a substance is the weaker it becomes. So in this case as the sodium thiosulphate is weakened through being diluted with distilled water, it will take ...

... contaminate it. What will I keep constant? * The volume of sodium thiosulphate * Use the same 250ml beaker What I will vary? * I will vary the concentration of hydrochloric acid. (by adding the correct amount of water, stated below. What I will ...

... make this experiment a fair test, we need to make sure we do a number of things. In this experiment we are trying to find the rate of reaction using concentration as a factor, so there is a number of ...

... reaction rate would take place here. Increasing the temperature of the Sulphuric Acid would also make the reaction faster because the particles of the acid would be moving a lot faster. When the particles move a lot faster there is more ...

... the experiment 6. Pestle and mortar to crush the calcium carbonate into powder 7. A burette to measure accurately the Hydrochloric Acid The method I am going to use to perform my experiment are- 1. Set up apparatus 2. Measure out 25cm3 of acid using ...

... this form they are deposited 'dry', causing the same damage as when they land dissolved in rain or snow. In this form they can also do internal damage to plants as they are taken up from the soil. The pH ...

... it has Cu ions. These break the hydrogen and disulphide bonds, because they both have ?- and ?+ charges and the ?- charges are attracted to copper ions. The copper sulphate is therefore breaking the bonds, changing the structure of ...

... the hot sun and cold rain. A shelter provides safety from other animals that might cause them harm. A shelter is a safe area to call home. A dog without a fenced yard or enclosed patio is a dog that ...

... performed - The concentration/volume of lipase in each test tube - The number of drops of phenolphthalein in each test tube - The volume of total solution - Volumes of cream and sodium carbonate - Concentration of sodium bicarbonate Responding- the time ...

... used to: * Activate the enzymes in the seed * Help the conservation of starch to sugar, and proteins to amino acids * Transport the sugar in solution from the cotyledons to the growing regions WHAT HAPPENS DURING GERMINATION? A typical seed stores carbohydrates, lipids ...

... and out to the surroundings. Materials that are good thermal conductors tend to be good electrical conductors; metals such as gold, silver and copper have high thermal conductivity's and will conduct heat readily. Materials such as glass have much smaller ...

... this will also affect the result because water is lost and the solution gets more concentrated and dissolves less boric acid. Volume of H2O added (cm³) Temperature of which crystals first formed (?C) Average temperature (?C) 10.0 73 /73, 72.5 /74.5, 68 /69 /69, 71 ...

... would expect that with a longer duration, there would be more time for the reaction to occur. As time as the changing factor it would be very difficult to get an accurate measurement of the rate of reaction. I do believe ...

... The heat energy will be conducted throughout the metal cup to the outer surface where it will be transferred to the air around the cup as radiation. 3. RADIATION - hot objects (i.e. the metal cup) emit mainly INFRA-RED radiation, and ...

... object emits will depend on the surface. The black cup had a dark matt surface and therefore will emit more radiation. This will mean that the black cup will lose more infrared radiation than the silver cup (which is a ...

... the metal cup to the outer surface where it will be transferred to the air around the cup as radiation. RADIATION - hot objects (i.e. the metal cup) emit mainly INFRARED radiation, and the hotter the object the more radiation it ...

... lid it will take even longer to cool, because, as you can see in the picture below, evaporation will also take place. If I have a lid, the heat will then be stopped from escaping into the air through the ...

... in the given time will vary. I think that if the acid concentration is high, then the marble chips will dissolve faster. If the concentration of acid is low or if acid is not present, the marble chips will dissolve ...

... hydrogen measured is going to be between 0-100cm3 The range of hydrochloric acid concentration is going to be the following; Acid (cm3) Water (cm3) 50 0 40 10 30 20 20 30 10 40 From my preliminary experiments I found that it is best to use 0.1 of a gram of magnesium powder, because ...

... this case calcium carbonate, has a large surface area more acid molecules can come into contact with it at the same time, allowing more to react simultaneously. If the same volume of the solid is divided into smaller pieces it ...

... heating in air and burns with a dazzling white flame. Normally magnesium is coated with a layer of oxide, MgO, that protects magnesium from air and water. Experiment Plan/Aim: I am going to find out what factors affect the reaction between Magnesium ...

... the marbles will be rinsed fully so any by-products from the last experiment will not affect the next one. Prediction. My prediction is that if I keep the same volume of liquid and the same temperature and only change the concentration ...

... This is where the factors I mentioned come into play; for example if there is more particles a reaction is less likely to occur, this is when surface area is involved. When temperatures are higher the particles move around more ...