To prepare a 2M lactose solution, you need to know that Molarity (M) is defined as the number of moles of a substance per liter of solution.

Step 1: Convert the volume from ml to L: 500 ml = 0.5 L

Step 2: Use the molarity formula. M = moles/L. We rearrange the formula to find moles = M * L.

Step 3: Substitute the given values into the formula: moles = 2M * 0.5L = 1 mole of lactose.

Step 4: Convert moles to grams using the molecular weight. The molecular weight of lactose is 342.3 g/mol. So, 1 mole of lactose = 342.3 g.

Therefore, you would need 342.3 g of lactose to prepare 500 ml of a 2M lactose solution.

Question

To prepare a 2M lactose solution, you need to know that Molarity (M) is defined as the number of moles of a substance per liter of solution.

Step 1: Convert the volume from ml to L: 500 ml = 0.5 L

Step 2: Use the molarity formula. M = moles/L. We rearrange the formula to find moles = M * L.

Step 3: Substitute the given values into the formula: moles = 2M * 0.5L = 1 mole of lactose.

Step 4: Convert moles to grams using the molecular weight. The molecular weight of lactose is 342.3 g/mol. So, 1 mole of lactose = 342.3 g.

Therefore, you would need 342.3 g of lactose to prepare 500 ml of a 2M lactose solution.

Knowee AI · Accepted Answer

To prepare a 2M lactose solution, you need to know that Molarity (M) is defined as the number of moles of a substance per liter of solution.

Step 1: Convert the volume from ml to L: 500 ml = 0.5 L

Step 2: Use the molarity formula. M = moles/L. We rearrange the formula to find moles = M * L.

Step 3: Substitute the given values into the formula: moles = 2M * 0.5L = 1 mole of lactose.

Step 4: Convert moles to grams using the molecular weight. The molecular weight of lactose is 342.3 g/mol. So, 1 mole of lactose = 342.3 g.

Therefore, you would need 342.3 g of lactose to prepare 500 ml of a 2M lactose solution.

Given the molecular weight of lactose= 342.3 g/mol how many grams of lactose would you need to prepare 500ml of a 2M lactose solution