At the other extreme, a 10 M solution of NaOH would have a pH of 15. Numerical examples from Shipman, Wilson and Todd. In pure water, the molar concentration of H + ions is 10-7 M and the concentration of OH-ions is also 10-7 M.
In order to tell if a guava is ripe, squeeze it gently. If it gives under your fingers, its ripe. 2. Look for any blemishes on the guava. You want to try to select guavas that are blemish-free. Blemishes or bruises can mean the fruit is bad or will not taste good. 3. Check the color of the guava. Ripe guavas are those that have gone from bright green to a softer yellowish-green color. If you see a touch of pink on the fruit, it is in its prime. If you don't find any that are yellow, you can always buy green guava and wait for them to ripen.
$6.99. Ruby Supreme Guava Psidium guajava. Plants for sale are currently growing at between 8-12. Each plant is lab grown from tissue cultures to be a Disease free plant.Ruby Supreme produce large, ovoid fruit with deep-pink flesh; Is considered by many to be one of the best fresh guava.6.99. Ruby Supreme Guava Psidium guajava. Plants for sale are currently growing at between 8-12. Each plant is lab grown from tissue cultures to be a Disease free plant.