GCSE Chemistry Making an insoluble salt by Precipitation 

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This does not effect the rate of reaction, you however increase the rate of reaction by using higher concentration or applying heat

Many compounds of lead are coloured, such as lead iodide (bright yellow). However, lead nitrate, the starting material, is colourless.

@@richardhiggins6471 hey dude what is the chemical for mula of the reaction

@@ananyanotfound7469 Pb(NO3)2 + 2 KI --> PbI2 + 2 KNO3 (where the numbers after the symbols should all be small "subscripts").

In an exam you won't need to write a conclusion to this type of question, but maybe a short description of the experiment: it might even help to do it in bullet points: 1. Mix the 2 chemicals in a beaker 2. Pour the mixture through filter paper in a filter funnel (if they ask you to name pieces of apparatus) 3. Rinse with distilled water. 4. Scrape the solid off the paper and dry it in a warm place. In AQA exams they don't often ask for this method, but they might give you a balanced equation showing state symbols, and ask you what you would see. The clue would be that both reactants are solutions (so clear liquids) but one of the products is a solid (so the mixture goes cloudy.

Thanks for taking the time to write this comment because I have my IGs next week. Oh yeah and I asked my teacher... but thanks anyway

@@saud9333 how u do? i got em in may

@@diego.noriegaa bruhh its been 5 years im in my 3rd year of mechanical engineering now lmao. i did great on the igcses had an A* in chemistry. how was ur results?

@@saud9333 damnnn bro. i still haven't done the real thing. But i got a B on my mock...

@@diego.noriegaa goodluck bru once u get the hang of how to answer the questions its very simple. go thru past paper marking schemes and practice that.

Almost - potassium nitrate.

@@richardhiggins6471 that was close😐

It just so happens that almost all lead compounds are insoluble (lead nitrate being one of the few soluble lead compounds). So when the lead nitrate and potassium iodide react, they "swap partners" to make potassium nitrate (very soluble - in the filtrate) and lead iodide (bright yellow insoluble solid). At GCSE you aren't expected to know that lead compounds are mostly insoluble. However, in the exam you might be given an equation for a reaction like this, including state symbols (s, l, g and aq), and asked to identify the precipitate based on which formula in the equation has (s) after it.

Hi, the potassium nitrate remains dissolved in the solution that goes through the filter paper. All potassium compounds are soluble in water, as are all nitrate compounds.

The fact that he replied 6 years after posting that video. He is a true hero.

+Kaz B They're both soluble and can be made in to a solution form, which is needed for the precipitation reaction.

+Kaz B And so when you mix the two, you get silver chloride and sodium nitrate. Silver chloride is an insoluble salt, which you get from the precipitation reaction.

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