Chapter 12.3 concentration –

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Presentation transcript:

Chapter 12.3 concentration – a measure of the amount of solute in a given amount of solvent or solution there are 2 ways to measure concentration molarity – the number of moles of solute in one liter of solution molarity (M) = 𝑎𝑚𝑜𝑢𝑛𝑡 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑒 (𝑚𝑜𝑙) 𝑣𝑜𝑙𝑢𝑚𝑒 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 (𝐿)

Chapter 12.3 ex. What is the molarity of a 3.50 L solution that has 90.0 g of NaCl in it? What mass of glucose (C6H12O6) is needed to make 5.00 x 103 L of 0.215 M solution?

Chapter 12.3 molality – concentration of a solution expressed in moles of solute per kilograms of solvent molality (m) = 𝑎𝑚𝑜𝑢𝑛𝑡 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑒 (𝑚𝑜𝑙) 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑠𝑜𝑙𝑣𝑒𝑛𝑡 (𝑘𝑔)

Chapter 12.3 ex. Find the molality of a solution made by dissolving 17.1 g of C12H22O11 in 125 g of H2O. What quantity in grams of methanol (CH3OH) is required to prepare a 0.244 m solution in 400 g of water?

Chapter 12.3