C6H12O6=180 gm

to make 1M how much H2O will you need?
to make a o.1M how much H2O will you need?

To determine the amount of water (H2O) needed to prepare a specific molar concentration (M) solution, we need to know the volume of the final solution that we want to prepare. The formula weight of glucose (C6H12O6) is given as 180 grams. However, we'll need the number of moles of glucose to calculate the volumes accurately.

1. To make a 1M solution:
To prepare a 1M solution, we need to dissolve 180 grams of glucose in water and then make up the volume to obtain the desired solution. The volume will depend on how much solution you would like to make, in liters (L).

Let's assume you want to make 1 liter (L) of a 1M glucose solution. First, convert the given formula weight of glucose (180 grams) to moles by dividing it by the molar mass of glucose:
180 g / 180 g/mol = 1 mole

Since we want to prepare 1 mole of glucose in 1 liter (L) of solution, there is no need for additional water. Thus, you would not need to add any H2O to make a 1M glucose solution.

2. To make a 0.1M solution:
Similarly, to prepare a 0.1M glucose solution, you need to dissolve a certain amount of glucose in water and then adjust the volume.

Let's say you want to make 1 liter (L) of a 0.1M glucose solution. The desired molarity is 0.1M, which means there will be 0.1 moles of glucose in 1 liter (L) of final solution.

To calculate the amount of glucose needed, multiply the desired number of moles by the formula weight of glucose:
0.1 moles x 180 g/mol = 18 grams

In this case, you need to dissolve 18 grams of glucose in water. Again, since the final volume is 1 liter (L), you would not need to add any additional water because the glucose will be dissolved in 1 liter (L) of water.

Therefore, to make both a 1M and a 0.1M glucose solution, you would not need to add any water as long as you are dissolving the glucose in the desired volume of water.